Kaiser Bottom Fish OnlineFree trialNew StuffHow It WorksContact UsTerms of UseHome
Specializing in Canadian Stocks
SearchAdvanced Search
Welcome Guest User   (more...)
Home / Education
Education
 

SDLRC - Perovskite


The Sheahan Diamond Literature Reference Compilation - Scientific and Media Articles based on Major Keyword - Perovskite
The Sheahan Diamond Literature Reference Compilation is compiled by Patricia Sheahan who publishes on a monthly basis a list of new scientific articles related to diamonds as well as media coverage and corporate announcements called the Sheahan Diamond Literature Service that is distributed as a free pdf to a list of followers. Pat has kindly agreed to allow her work to be made available as an online digital resource at Kaiser Research Online so that a broader community interested in diamonds and related geology can benefit. The references are for personal use information purposes only; when available a link is provided to an online location where the full article can be accessed or purchased directly. Reproduction of this compilation in part or in whole without permission from the Sheahan Diamond Literature Service is strictly prohibited. Return to Diamond Keyword Index
Sheahan Diamond Literature Reference Compilation - Scientific Articles by Author for all years
A-An Ao+ B-Bd Be-Bk Bl-Bq Br+ C-Cg Ch-Ck Cl+ D-Dd De-Dn Do+ E F-Fn Fo+ G-Gh Gi-Gq Gr+ H-Hd He-Hn Ho+ I J K-Kg Kh-Kn Ko-Kq Kr+ L-Lh
Li+ M-Maq Mar-Mc Md-Mn Mo+ N O P-Pd Pe-Pn Po+ Q R-Rh Ri-Rn Ro+ S-Sd Se-Sh Si-Sm Sn-Ss St+ T-Th Ti+ U V W-Wg Wh+ X Y Z
Sheahan Diamond Literature Reference Compilation - Media/Corporate References by Name for all years
A B C D-Diam Diamonds Diamr+ E F G H I J K L M N O P Q R S T U V W X Y Z
Each article reference in the SDLRC is tagged with one or more key words assigned by Pat Sheahan to highlight the main topics of the article. In an effort to make it easier for users to track down articles related to a specific topic, KRO has extracted these key words and developed a list of major key words presented in this Key Word Index to which individual key words used in the article reference have been assigned. In most of the individual Key Word Reports the references are in crhonological order, though in some such as Deposits the order is first by key word and then chronological. Only articles classified as "technical" (mainly scientific journal articles) and "media" (independent media articles) are included in the Key Word Index. References that were added in the most recent monthly update are highlighted in yellow.

Perovskite is a calcium titanium oxide mineral formed in the mantle. It is relevant to diamonds because it can show up in kimberlites. These articles require specialized chemical knowledge to be comprehensible.

Perovskite
Posted/
Published
AuthorTitleSourceRegionKeywords
DS1975-0324
1976
Lewis, R.D., Meyer, H.O.A., Bolivar, S.L., Brookins, D.G.Mineralogy of the Diamond Bearing 'kimberlite' Murfreesboro, Arkansaw.Eos, Vol. 57, No. 10, P. 761. (abstract.).United States, Gulf Coast, Arkansas, PennsylvaniaGeochronology, Alteration, Petrography, Perovskite
DS1982-0561
1982
Shee, S.R.The Opaque Oxides of the Wesselton Mine, Kimberlite, Kimberley, South Africa.Proceedings of Third International Kimberlite Conference, TERRA COGNITA, ABSTRACT VOLUME., Vol. 2, No. 3, P. 211, (abstract.).South AfricaKimberlite, Petrography, Spinel, Ilmenite, Perovskite, Rutile
DS1985-0048
1985
Barker, D.S., Mitchell, R.H., Mckay, D.Late Cretaceous Nephelinite to Phonolite Magmas Balcones Province, Texas.Geological Society of America (GSA), Vol. 17, No. 3, FEBRUARY P. 150. (abstract.).United States, Texas, Gulf CoastPerovskite, Petrography
DS1985-0314
1985
Jones, A.P., Wyllie, P.J.Paragenetic Trends of Oxide Minerals in Carbonate Rich Kimberlites, with New Analyses from the Benfontein Sill, South Africa.Journal of PETROLOGY, Vol. 26, No. 1, PP. 210-222.South AfricaIlmenite, Spinel, Textures, Petrography, Perovskite
DS1985-0444
1985
Meyer, H.O.A., Villar, L.M.Alnoite in the Sierras Subandinas, Northern ArgentinaGeological Society of America (GSA), Vol. 17, No. 3, P. 167. (abstract.).South America, ArgentinaPerovskite, Mineral Chemistry
DS1985-0589
1985
Saxena, S.K., Fei, Y.High Pressure Phase Equilibrium in the System Iron-magnesium-si-oGeological Society of America (GSA), Vol. 17, No. 7, P. 708. (abstract.).GlobalExperimental Petrology, Perovskite, Petrogenesis
DS1989-0216
1989
Carnegie InstituteEffect of temperature and pressure on MgSiO3 perovskiteH-kwang Mao, Russell Hemley, Jinfu Shu, Liang-chen ChenCarnegie Institution Year Book 88 1988-1989 (June), pp. 144-145GlobalExperimental petrology, Perovskite
DS1989-1096
1989
Navrotsky, A., Weidner, D.J.Perovskite: a structure of great interest to geophysics and materialscienceAmerican Geophysical Union (AGU) Geophysical Monograph Series, No. GM 45, 146p. ISBN 0-87590-071-2 @ 27.00GlobalPerovskite, Geophysics
DS1989-1406
1989
Smith, C.B., Allsopp, H.L., Garvie, O.G., Kramers, J.D., JacksonNote on the uranium-lead (U-Pb) (U-Pb) perovskite method for dating kimberlites: examples fromChemical Geology, Vol. 79, pp. 137-145South Africa, Northwest TerritoriesGeochronology, Perovskite
DS1989-1572
1989
Walker, D., Agee, C.Partioning "equilibrium",temperature gradients, and constraints on earthdifferentiationEarth and Planetary Science Letters, Vol. 96, pp. 49-60GlobalMantle petrogenesis -experimental petrology, Perovskites
DS1990-0346
1990
Compston, W., Williams, I.S., Wendt, I.U-Th-lead systematics of individual perovskite grains from the Allende and Murchison carbonaceous chondritesEarth and Planetary Science Letters, Vol. 101, pp. 379-387IrelandMeteorites, Perovskites
DS1990-0504
1990
Galasso, F.S.Perovskites and high TC superconductorsGordon and Breach Publk, Book 293p. approx. $ 110.00 ISBN 2-88124-391-6GlobalPerovskites, Superconductors
DS1990-1509
1990
Veksler, I.V., Teptelev, M.Conditions for crystallization and concentration of perovskite-type minerals in alkaline magmasLithos, Special Issue, Vol. 25, No. 4, pp. 177-189RussiaAlkaline rocks, Perovskite
DS1990-1600
1990
Xiaoyuan Li, Jeanloz, R.Laboratory studies of the electrical conductivity of silicate perovskites at high pressures and temperaturesJournal of Geophysical Research, Vol. 95, B4, April 10, pp. 5067-5078GlobalExperimental petrology, Perovskites
DS1991-0268
1991
Chernysheva, Ye.A., Nechelyustov, G.N., mKvitko, T.D., Veys, B.T.Compositional evolution of perovskite in the alkali rocks of the lower Sayan carbonatite complexGeochemistry International, Vol. 28, No. 4, pp. 102-108RussiaCarbonatite, Perovskite, mineralogy
DS1992-0657
1992
Halliday, A.N., et al.Cerium, Uranium, Barium, Potassium and lead in earth's mantle: theEos, Transactions, Annual Fall Meeting Abstracts, Vol. 73, No. 43, October 27, abstracts p. 655MantlePerovskite, barium, cerium, uranium, potassium
DS1992-0698
1992
Henderson, W.A.Hercynite crystals from the Kimzey calcite Quarry Magnet Cove, Arkansaw...and theri distinction from perovskiteRocks and Minerals, Vol. 67, No. 6, November-December pp. 402-404ArkansasPerovskite, Carbonatite
DS1992-0733
1992
Hu, M.S., Wenk, H.R., Sinitsyn, D.Microstructures in natural perovskitesAmerican Mineralogist, Vol. 77, No. 3-4, March-April pp. 359-373China, Arkansas, Russia, Kola Peninsula, KareliaPerovskites, Petrology
DS1992-0850
1992
Kesson, S.E., Fitz Gerald, J.D.Partitioning of MgO, FeO, NiO, MnO, Cr2O3 between magnesian silicateperovskite, magnesiowustite: implications origin of inclusions in diamond, mantleEarth and Planetary Science Letters, Vol. 111, No. 2-4, July pp. 229-240MantlePerovskite, Diamond inclusions
DS1992-0851
1992
Kesson, S.E., Fitzgerald, J.D.Partitioning of high MgO, FeO, NiO, MnO and Cr2O3 between perovskite andmagnesiowustite: implications origin inclusions diamond and composition lowermantleProceedings of the 29th International Geological Congress. Held Japan August 1992, Vol. 1, abstract p. 48MantlePerovskite, Diamond inclusions
DS1992-1478
1992
Stixrude, L., Hemley, R.J., Fei, Y., Mao, H.K.Thermoeleasticity of silicate perovskite and magnesiowustite and stratification of the earth's mantleScience, Vol. 257, August 21, pp. 1099-1101MantleStratification, Perovskite
DS1992-1643
1992
Weidner, D.J., Wang, Y.Properties of perovskite and implications for the mantleEos Transactions, Vol. 73, No. 14, April 7, supplement abstracts p. 316MantlePerovskite
DS1993-0834
1993
Knittle, E., Lay, T.Properties of silicate perovskite and seismic structures in the LowerMantle.American Geophysical Union, EOS, supplement Abstract Volume, October, Vol. 74, No. 43, October 26, abstract p. 571.MantleGeophysics -seismics, Perovskite
DS1993-1014
1993
Meade, C.Texture measurements on highly strained aggregates of olivine and silicate perovskite and the application for the study of seismic anisotropy in themantle.American Geophysical Union, EOS, supplement Abstract Volume, October, Vol. 74, No. 43, October 26, abstract p. 551.MantlePerovskite, Mineralogy
DS1993-1537
1993
Stixrude, L., Cohen, R.E.Stability of orthorhombic MgSiO2 perovskite in the earth's lower mantleNature, Vol. 364, August 12, pp. 613-615.MantlePerovskite
DS1993-1538
1993
Stixrude, L., Cohen, R.E.Stability of orthorhombic MgSiO2 perovskite in the Earth's lower mantleNature, Vol. 364, No. 6438, August 12, pp. 613-616.MantlePerovskite
DS1993-1640
1993
Van den Berg, A.P., et al.High melting temperature of perovskite: dynamical implications for creep In the lower mantle.American Geophysical Union, EOS, supplement Abstract Volume, October, Vol. 74, No. 43, October 26, abstract p. 557.MantlePerovskite, Petrology
DS1993-1704
1993
Weidner, D.J.Equation of state properties of mantle perovskitesAmerican Geophysical Union, EOS, supplement Abstract Volume, October, Vol. 74, No. 43, October 26, abstract p. 571.MantleMineralogy, Perovskite
DS1993-1771
1993
Wright, K., Price, G.D.Computer simulation of defects and diffusion in perovskitesJournal of Geophysical Research, Vol. 98, No. B12, December 10, pp. 22, 245-22, 253.MantlePerovskites
DS1993-1809
1993
Zerr, A., Boehler, R.Melting of (MgFe)SiO2 perovskite to 625 kilobars: indication of a high melting temperature in the lower mantle.Science, Vol. 262, No. 5133, October 22, pp. 553-554.MantleMelting, Perovskite
DS1994-0753
1994
Heinz, D.L., et al.high pressure melting of (Mg, Fe) SiO3 perovskiteScience, Vol. 264, April 8, pp. 279-281.GlobalPerovskite, magnesium, iron
DS1994-0809
1994
Irifune, T.Absence of an aluminous phase in the upper part of the Earth's lowermantle.Nature, Vol. 370, July 14, pp. 131-133.MantlePerovskite
DS1994-1168
1994
Meno, Y., et al.Superconductivity in a layered perovskite without copperNature, Vol. 372, Dec. 8, pp. 532-534MantleSuperconductivity, Perovskite
DS1994-1212
1994
Mitchell, R.H.Rare earth minerals: chemistry, origin and ore depositsMineralogical Society Series, Vol. 5, Chapter 3, approx. 50pGlobalRare earths, Perovskites
DS1994-1307
1994
O'Neill, B., Jeanhoz, R.MgSiO3 FeSiO3 Al2O3 in the earth's lower mantle:perovskite and garnet at1200 km depth.Journal of Geophysical Research, Vol. 99, No. B 10, Oct. 10, pp. 19, 901-916.MantlePerovskite, Petrology
DS1994-1829
1994
Van Keken, P.E., et al.Implications for mantle dynamics from the high melting temperature ofperovskite.Science, Vol. 264, No. 5164, June 3, pp. 1437-1438.MantlePerovskite
DS1995-0043
1995
Anderson, O.L., Masuda, K., Guo, D.Pure silicate perovskite and the PREM lower mantle model: a thermodynamicanalysis.Physics of the Earth and Plan. Interiors, Vol. 89, pp. 35-49.MantlePerovskite
DS1995-0313
1995
Chopelas, A.Thermoelastic parameters of lower mantle phases perovskite and MgO from vibrational spectroscopy...Eos, Vol. 76, No. 46, Nov. 7. p.F579. Abstract.GlobalPerovskite, Petrology -experimental
DS1995-0627
1995
GeotimesLower mantle may harbor hydrogenGeotimes, Vol. 40, No. 2, Feb. p. 8.MantlePerovskite
DS1995-0943
1995
Kesson, S.E., Fitz Gerald, J.D., Shelley, WithersPhase relations, structure and crystal chemistry of some aluminous silicateperovskites.Earth and Planetary Science Letters, Vol. 134, No. 1-2, Aug. 15, pp. 187-200.GlobalPerovskites
DS1995-1151
1995
Malavergne, V., Guyot, F., Peyronneau, J., Poirier, J-P.Distribution du fer, cobalt, nickel, entre mineraux du manteau inferieurterrestre haute pressure/temperatureCompte Rendus Sci. Paris., (in French), Vol. 320, II a, pp. 455-462.MantlePerovskite, Microscopy
DS1995-2028
1995
Wang, Y., Martinez, I., Guyot, F., Liebermann, R.C.The breakdown of olivine to perovskite and magnesiowustiteEos, Vol. 76, No. 46, Nov. 7. p.F618. Abstract.MantleSubduction, Perovskite
DS1995-2050
1995
Wentzcovitch, R.M., Ross, N.L., Price, G.D.Ab initio study of MgSiO3 and CaSiO3 perovskites at lower mantlepressures.Physics of Earth Plan. International, Vol. 90, pp. 101-112.MantlePerovskites
DS1996-0116
1996
Beran, A., Libowitzky, E., Armbruster, T.A single crystal infrared spectroscopic and x-ray diffraction study of untwinned San Benito perovskite.Canadian Mineralogist, Vol. 34, pt. 4, August, pp. 803-809.CaliforniaPerovskite, Mineralogy
DS1996-0256
1996
Chakmouradian, A.R., Mitchell, R.H.Perovskites from ultramafites and foidolites of the Khbin a alkaline complex Kola Peninsula, Russia.Geological Association of Canada (GAC) Annual Abstracts, Vol. 21, abstract only p.A16.Russia, Kola PeninsulaPerovskites, Alkaline -Khbina
DS1996-0273
1996
Chopelas, A.Thermal expansivity of lower mantle phases MgO and MgSiO4 perovskite at high pressure derived spectroscopyPhysics of the Earth and Plan. Interiors, Vol. 98, No. 1-2, Nov. pp. 3-16.MantlePerovskite
DS1996-0449
1996
Fei, Y., Wang, Y.Maximum solubility of FeO in (magnesium, iron) SiO3 perovskite as a function of temperature at 26 GPa:FeO low mantleJournal of Geophysical Research, Vol. 101, No. 5, May 10, pp. 1525-30.MantlePerovskite
DS1996-0611
1996
Hassan, I., Kudoh, Y., Ito, E.MgSiO3 perovskite: a HRTEM studyMineralogical Magazine, Vol. 60, No. 5, Oct 1, pp. 799-804.GlobalPerovskite
DS1996-0716
1996
Kato, T., Ohtani, E., Ito, Y., Onuma, K.Element partioning between silicate perovskites and calcic ultrabasicmelt.Physics of the Earth and Planetary Interiors, Vol. 86, 2-3, pp. 201-207.MantlePerovskites, Kimberlite petrogenesis
DS1996-0841
1996
Li, X., Manga, M., Jeanloz, R.Temperature distribution in the laser heated diamond cell with externalheating, and implications perovskiteGeophysical Research Letters, Vol. 23, No. 25, Dec. 15, pp. 3775-3778.GlobalPerovskite
DS1996-0858
1996
Lloyd, F.E., Edgar, A.D., Ragnarsdottir, K.V.light rare earth element (LREE) distribution in perovskite, apatite and titanite from southwestUgand an xenoliths and kamafugite lavas.Mineralogy and Petrology, Vol. 57, No. 3-4, pp. 205-228.UgandaPerovskite, Rare earths, xenoliths
DS1996-0980
1996
Mitchell, R.H.Perovskites: a revised classification scheme for an important rare earth element host in alkaline rocks.Mineralogical Soc. Series, No. 7, pp. 41-76.GlobalRare earth minerals, Perovskites, alkaline rocks
DS1996-1256
1996
Saxena, S.K., Dubrovinsky, L.S., Hu, J.Stability of perovskite in the earth's mantleScience, Vol. 274, No. 5291, Nov. 22, pp. 1357-9.MantlePerovskite
DS1996-1376
1996
Stixrude, L., et al.Prediction of phase transition in CaSiO3 perovskite and implications for lower mantle structure.American Mineralogist, Vol. 81, pp. 1293-6.MantlePerovskite
DS1997-0748
1997
McCammon, C.Perovskite as a possible sink for ferric iron in the lower mantleNature, Vol. 387, No. 6634, June 12, pp. 694-5.MantlePerovskite
DS1998-0135
1998
Boehler, R., Zerr, A., Serghiou, Tschauner, HilgrenNew experimental constraints on the nature of DMineralogical Magazine, Goldschmidt abstract, Vol. 62A, p. 182-3.MantleCore mantle boundary layer, Perovskite
DS1998-0230
1998
Chalapathi Rao, N.V.Light rare earth elements (light rare earth element (LREE)) in perovskite from kimberlites of AndhraPradesh, India.Journal of Geological Society India, Vol. 51, June pp. 741-46.India, MahbubnagarPerovskite, mineral chemistry, Deposit - Lattavaram, Chigicherla, Maddur
DS1998-0367
1998
Dubrovinsky, L., Saxena, S.K., Johansson, B.Theoretical study of the stability of MgSiO3 perovskite in the deepmantle.Geophs. Res. Lett., Vol. 25, No. 23, Dec. 1, pp. 4253-56.MantlePerovskite
DS1998-0565
1998
Hama, J., Suito, K.Equation of state of MgSiO3 perovskite and its thermoelastic properties under lower mantle conditions.Journal of Geophysical Research, Vol. 103, No. 4, Apr. 10, pp. 7443-62.MantlePerovskite
DS2000-0152
2000
Chakhmouradian, A.R., Mitchell, R.H.Occurrence, alteration patterns and compositional variation of perovskite in kimberlites.Canadian Mineralogist, Vol. 38, 4, Aug. pp.975-94.Northwest Territories, Ontario, Russia, YakutiaPerovskites, Alteration, textures
DS2000-0317
2000
Gasparik, T.Evidence for the transition zone origin of some MgFeO inclusions in diamondEarth and Planetary Science Letters, Vol.183, No.1-2, Nov.30, pp. 1-5.MantleMagnesiowustite, perovskite, Transition zones, discontinuity
DS2000-0542
2000
Kubo, A., Akaogi, M.Post garnet transitions in the system up to 28 Gpas: phase relations of garnet, ilmenite and perovskite.Physical Earth and Planetary Interiors, Vol. 121, No. 1-2, pp.85-102.GlobalGarnets, Perovskite
DS2000-0632
2000
Matsui, M.Molecular dynamics simulation of perovskite and 660 km seismic discontinuitPhysical Earth and Planetary Interiors, Vol. 121, No. 1-2, pp.77-84.MantlePerovskites, Discontinuity
DS2000-0892
2000
Shim, S.H., Duffy, T.S., Shen, G.The stability and PVT equation of state of CaSiO3 perovskite in the Earth's lower mantle.Journal of Geophysical Research, Vol.105, No.11, Nov.10, pp.25955-68.MantlePerovskite
DS2001-0029
2001
Andrault, D.Evaluation of (magnesium, iron) partitioning between silicate perovskite and magnesiowustite up to 120 GPa and 2300KJournal of Geophysical Research, Vol. 106, No.2, Feb.10, pp. 2079-88.MantlePerovskite
DS2001-0030
2001
Andrault, D., Bolfan-Casanova, N., Guignot, N.Equation of state of lower mantle ( Al Fe MgSiO3) perovskiteEarth and Planetary Science Letters, Vol. 193, No. 3-4, pp.501-8.MantleGeochemistry, Perovskite
DS2001-0166
2001
Chakmouradian, A.R., Mitchell, R.H.Crystal structure of novel high pressure perovskite a possible host for Thin the upper mantle.American Mineralogist, Vol. 86, No. 9, pp. 1076-80.MantlePerovskite
DS2001-0225
2001
Daniel, I., Cardon, H., Fiquet, G., Guyot, F., MezouarEquation of state of Aluminum bearing perovskite to lower mantle pressure conditionsGeophysical Research Letters, Vol. 28, No. 19, Oct. 1, pp. 3789-92.MantlePerovskite
DS2001-0441
2001
Hamma, J., Suito, K.Thermoelastic models of minerals and the composition of the Earth's lower mantlePhysics of the Earth and Planetary Interiors, Vol. 125, No. 1-4, pp. 147-66.MantleGeophysics - seismics, Perovskites, magnesiowustite
DS2001-0480
2001
Hirose, K., Kombayashi, T., Murakami, M., Funakoshi, K.In situ measurements of the majorite akimotoite perovskite phase transition boundaries in MgSiO3.Geophysical Research Letters, Vol. 28, No. 23, Dec. pp. 4351-4.MantlePerovskite
DS2002-1025
2002
McCammon, C.A., Beccero, A.I., Lauterbach, S., Blass, U., Marion, S.Oxygen vacancies in perovskite and related structures: implications for the lower mantle.Materials Research Society Symposium Proceedings, Vol. 718, pp. 109-114. Ingenta 1025440383MantlePerovskite
DS2002-1752
2002
Xu, Y., McCammon, C.Evidence for ionic conductivity in lower mantle perovskiteJournal of Geophysical Research, Oct. 29, 10.1029/2001JB000677.MantlePerovskite
DS2003-0130
2003
Bolfan-Casanova, N., Keppler, H., Rubie, D.C.Water partitioning at 660 km depth evidence for very low water solubility in magnesiumGeophysical Research Letters, Vol. 30, 17, 1905 DOI.1029/2003GLO17182MantlePerovskite
DS2003-0169
2003
Brodholt, J.P., Oganov, A.R., Price, G.D.Computational mineral physics and the physical properties of perovskitePhilosophical Transactions of the Royal Society of London, Vol. 360, 1800, pp. 2507-20.GlobalMineralogy, mantle, perovskite
DS2003-1263
2003
Shen, Y., Blum, J.Seismic evidence for accumulated oceanic crust above the 660 km discontinuityGeophysical Research Letters, Vol. 30, 18, 1925 DOI.1029/2003GLO17991South AfricaMantle, subductioon, geophysics - seismics, Ca-perovski
DS200412-0180
2003
Bolfan-Casanova, N., Keppler, H., Rubie, D.C.Water partitioning at 660 km depth evidence for very low water solubility in magnesium silicate perovskite.Geophysical Research Letters, Vol. 30, 17, 1905 DOI.1029/2003 GLO17182MantlePerovskite
DS200412-0215
2004
Brodholt, J.Constraining chemical heterogeneity in the Earth's lower mantle.Lithos, ABSTRACTS only, Vol. 73, p. S14. abstractMantleGeophysics - seismics, perovskites
DS200412-0216
2003
Brodholt, J.P., Oganov, A.R., Price, G.D.Computational mineral physics and the physical properties of perovskite.Philosophical Transactions of the Royal Society of London Series A Mathematical Physical and Engineering Sciences, Vol. 360, 1800, pp. 2507-20.TechnologyMineralogy, mantle, perovskite
DS200412-0443
2004
Deschamps, F., Trampert, J.Towards a lower mantle reference temperature and composition.Earth and Planetary Science Letters, Vol. 222, 1, pp. 161-175.MantleGeothermometry, thermal boundary layer, perovskite
DS200412-0882
2004
Itaka, T., Hirose, K., Kawamura, K., Murakami, M.The elasticity of the MgSiO3 post perovskite phase in the Earth's lowermost mantle.Nature, No. 6998, July 22, pp. 442-444.MantlePerovskite
DS200412-1802
2003
Shen, Y., Blum, J.Seismic evidence for accumulated oceanic crust above the 660 km discontinuity beneath southern Africa.Geophysical Research Letters, Vol. 30, 18, 1925 DOI.1029/2003 GLO17991Africa, South AfricaMantle, subductioon, geophysics - seismics, Ca-perovski
DS200412-2017
2004
Tscuchiya, T., Tsuchiya, J., Umemoto, K., Wentzcovitch, R.M.Elasticity of post perovskite MgSiO3.Geophysical Research Letters, Vol. 31, 14, July 28, 10.1029/2004 GLO20278MantlePerovskite mineralogy
DS200412-2075
2004
Walter, M.J., Kubo, A., Yoshino, T., Brodholt, J., Koga, K.T., Ohishi, Y.Phase relations and equation of state aluminous Mg silicate perovskite and implications for Earth's lower mantle.Earth and Planetary Science Letters, Vol. 222, 2, pp. 501-516.MantlePerovskite
DS200412-2099
2004
Wentzcovitch, R.M., Karki, B.B., Cococcioni, M., De Gironncoli, S.Thermoelastic properties of MgSiO3 perovskite: insights on nature of the Earth's lower mantle.Physical Review Letters, Vol. 92, 1. Jan. 1, Ingenta 1040799374MantlePerovskite
DS200512-0152
2005
Chakhmouradian, A.R., Mitchell, R.H.Subsolidus phase relationships in the system Ca Ti Nb OGAC Annual Meeting Halifax May 15-19, Abstract 1p.Perovskite, structure, carbonatite
DS200512-0424
2005
Hernlund, J.W., Thomas, C., Tackley, P.J.A doubling of the post perovskite phase boundary and structure of the Earth's lowermost mantle.Nature, no. 7035, pp. 882-885.MantlePerovskite
DS200512-0645
2005
Litasov, K., Ohtani, E., Sano, A., Suzuki, A., Funakoshi, K.In situ X-ray diffraction study of post spinel transformation in a peridotite mantle: implication for the 660 km discontinuity.Earth and Planetary Science Letters, Vol.238, 3-4, pp. 311-328.MantleUHP, ringwoodite, perovskite
DS200512-1039
2005
Stachel, T., Brey, G.P., Harris, J.W.Inclusions in sublithospheric diamonds: glimpses of deep Earth.Elements, Vol. 1, 2, March pp. 73-79.MantleDiamond inclusion, majorite, perovskite, subduction
DS200512-1158
2005
Wade, J., Wood, B.J.Core formation and the oxidation state of the Earth.Earth and Planetary Science Letters, Advanced in press,MantleAccretion, metal-silicate, perovskite
DS200612-0220
2005
Caracas, R., Cohen, R.E.Effect of chemistry on the stability and elasticity of the perovskite and post-perovskite phase in the MgSiO3 FeSi03 Al203 system and implications for the lowermost mantle.Geophysical Research Letters, Vol. 32, 16, Aug. 28, L16310MantlePerovskite
DS200612-1284
2005
Shim, S.H.Stability of MgSiO3 perovskite in the Lower Mantle.American Geophysical Union, Geophysical Monograph, Ed. Van der Hilst, Earth's Deep Mantle, structure ...., No. 160, pp. 261-282.MantlePerovskite
DS200712-0148
2007
Carpenter, M.A., Darling, T.W., Buckley, A.J., Taylor, P.A.Investigation of eleastic and An elastic phenomena associated with structural pphase transition in perovskites by Resonant Ultrasound Spectroscopy.Frontiers in Mineral Sciences 2007, Joint Meeting of Mineralogical societies Held June 26-28, Cambridge, Abstract Volume p.188.MantlePerovskite
DS200712-0149
2007
Carpenter, M.A., Darling, T.W., Buckley, A.J., Taylor, P.A.Investigation of eleastic and An elastic phenomena associated with structural pphase transition in perovskites by Resonant Ultrasound Spectroscopy.Frontiers in Mineral Sciences 2007, Joint Meeting of Mineralogical societies Held June 26-28, Cambridge, Abstract Volume p.188.MantlePerovskite
DS200712-0310
2007
Fei, Y.Experimental contraints on the chemistry and density of the Earth's lower mantle.Frontiers in Mineral Sciences 2007, Joint Meeting of Mineralogical societies Held June 26-28, Cambridge, Abstract Volume p.186-187.MantlePerovskite
DS200712-0311
2007
Fei, Y.Experimental contraints on the chemistry and density of the Earth's lower mantle.Frontiers in Mineral Sciences 2007, Joint Meeting of Mineralogical societies Held June 26-28, Cambridge, Abstract Volume p.186-187.MantlePerovskite
DS200712-0466
2007
Isaak, D.G., Gwanmesia, G.D., Falde, D., Davis, M.G., Triplett, R.S., Wang, L.The elastic properties of b-Mg2SiO4 from 295 to 660K and implications on the composition of Earth's upper mantle.Physics of the Earth and Planetary Interiors, Vol. 162, 1-2, pp. 22-31.ChinaPerovskite
DS200712-0467
2007
Isaak, D.G., Gwanmesia, G.D., Falde, D., Davis, M.G., Triplett, R.S., Wang, L.The elastic properties of b-Mg2SiO4 from 295 to 660K and implications on the composition of Earth's upper mantle.Physics of the Earth and Planetary Interiors, Vol. 162, 1-2, pp. 22-31.ChinaPerovskite
DS200712-0474
2007
Jackson, J.M., Sturhahn, W., Lerche, M., Li, J.Electronic structure of iron in aluminous ferromagnesium silicate perovskite under lower mantle conditions.Frontiers in Mineral Sciences 2007, Joint Meeting of Mineralogical societies Held June 26-28, Cambridge, Abstract Volume p.146.MantlePerovskite
DS200712-0475
2007
Jackson, J.M., Sturhahn, W., Lerche, M., Li, J.Electronic structure of iron in aluminous ferromagnesium silicate perovskite under lower mantle conditions.Frontiers in Mineral Sciences 2007, Joint Meeting of Mineralogical societies Held June 26-28, Cambridge, Abstract Volume p.146.MantlePerovskite
DS200712-0649
2007
Longo, M., McCammon, C.Fe3+/Fe in lower mantle (Mg,Fe)O: calibration of the 'flank method'.Plates, Plumes, and Paradigms, 1p. abstract p. A594.MantlePerovskite
DS200712-0743
2007
Monnereau, M., Yuen, D.A.Topology of the post perovskite phase transition and mantle dynamics.Proceedings of National Academy of Sciences USA, Vol. 104, 22, pp. 9156-9161. IngentaMantlePerovskite
DS200712-0981
2007
Shim, S-H., Kubo, A., Duffy, T.S.Raman spectroscopy of perovskite and post-perovskite phases of MgGeO3 to 123 GPa.Earth and Planetary Science Letters, Vol. 260, 1-2, pp. 166-178.MantlePerovskite
DS200712-0982
2007
Shim, S-H., Kubo, A., Duffy, T.S.Raman spectroscopy of perovskite and post-perovskite phases of MgGeO3 to 123 GPa.Earth and Planetary Science Letters, Vol. 260, 1-2, pp. 166-178.MantlePerovskite
DS200712-1224
2006
Zhang, F., Oganov, A.R.Valence state and spin transitions of iron in Earth's mantle silicates.Geochimica et Cosmochimica Acta, In press availableMantleD layer, perovskites
DS200812-0346
2008
Fialin, M., Catillon, G., Andrault, D.Disproportionation of Fe 2+ in Al free silicate perovskite in the laser heated diamond anvil cell as recorded by electron probe microanalysis of oxygen.Physica and Chemistry of Minerals, In press available 9p.MantlePerovskite
DS200812-0472
2007
Hirose, K., Brodholt, J., Lay, T., Yuen, D.A.An introduction to post-perovskite: the last mantle phase transition.AGU American Geophysical Union Monograph, No. 174, pp. 1-8.MantlePerovskite
DS200812-0702
2008
Mainprice, D., Tommasi, A., Ferre, D., Carrez, P., Cordier, P.Predicted glide systems and crystal preferred orientations of polycrystalline silicate Mg perovskite at high pressure: implications for seismic anisotropyEarth and Planetary Science Letters, Vol. 271, 1-4, pp. 135-144.MantlePerovskite - lower mantle
DS200812-0728
2008
McCammon, C., Kantor, I., Narygina, O., Roquette, J., Ponkratz, Sergieev, Mezouar, Prakapenka, DubrovinskyStable intermediate spin ferrous iron in lower mantle perovskite.Nature Geoscience, Vol. 1, 10, pp. 684-687.MantlePerovskite
DS200812-0816
2008
Ohta, K.The electrical conductivity of post-perovskite in Earth's D' layer.Science, Vol. 320, no. 5872, pp. 89-90.MantleGeophysics - perovskite
DS200812-1055
2008
Shim, S-H.The postperovskite transition.Annual Review of Earth and Planetary Sciences, Vol. 36, May, pp. 569-599.MantlePerovskite
DS200912-0453
2008
Longo, M., McCammon, C., Bulanova, G., Kaminsky, F.Iron oxidation state ( Mg.Fe)O calibration of the flank method on synthetic samples and application to natural inclusions in lower mantle diamonds.American Geological Union, Fall meeting Dec. 15-19, Eos Trans.Vol. 89, no.53, meeting supplement, 1p. abstractSouth America, Brazil, Mato GrossoPerovskite
DS200912-0519
2009
Mosenfelder, J.L., Asimow, P.D., Frost, D.J., Rubie, D.C., Ahrens, T.J.The MgSiO3 system at high pressure: thermodynamic properties of perovskite, postperovskite and melt from global inversion of shock and static compression data.Journal of Geophysical Research, Vol. 114, B1 B01203.MantlePerovskite
DS200912-0695
2008
Sinmyo, R., Ozawa, H., Jirose, K., Yasuhara, A., Endo, N., Sata, N., Ohishi, Y.Ferric iron content in (Mg,Fe) SiO3 perovskite and post-perocskite at deep lower mantle conditions.American Mineralogist, Vol. 93, 11/12 pp. 1899-1902.MantlePerovskite
DS200912-0774
2009
Tronnes, R.G.Structure, mineralogy and dynamics of the lowermost mantle.Mineralogy and Petrology, In press available ( 19p.)MantlePerovskite
DS201012-0280
2010
Hirose, K.Perovskite and post-perovskite in Earth's lower mantle.International Mineralogical Association meeting August Budapest, AbstractMantlePerovskite
DS201012-0505
2010
Mitchell, R.H.Structural complexities of natural and synthetic perovskites.International Mineralogical Association meeting August Budapest, AbstractTechnologyPerovskite
DS201012-0663
2010
Sarkar, C., Storey, C., Hawkesworth, C., Sparks, S., Field, M.Fingerprinting of kimberlite sources by isotope studies of accessory minerals: a mantle tracer.Goldschmidt 2010 abstracts, P. 553. abstractTechnologyGeochronology, perovskites
DS201012-0685
2010
Shahnas, D., Peltier, W.R.Layered convection and the impacts of the perovskite - postperovskite phase transition on mantle dynamics under isochemical conditions.Journal of Geophysical Research, Vol. 115, B 11, B11408.MantlePerovskite
DS201012-0696
2010
Shim, H.Iron in mantle silicate perovskite.International Mineralogical Association meeting August Budapest, AbstractMantlePerovskite
DS201112-0154
2011
Catalli, K., Shim, S-H., Dera, P., Prakapenka, V.B., Zhao, J., Sturhahn, W., Chow, P., Xiao, Y., Cynn, H., Evans, W.J.Effects of the Fe3 +spin transition on the properties of aluminous perovskite - new insights for lower mantle seismic heterogeneities.Earth and Planetary Science Letters, Vol. 310, 3-4, pp. 293-302.MantlePerovskite
DS201112-1110
2011
Wenk, H-R., Cottaar, S., Tome, C.N., McNamara, A., Romanowicz, B.Deformation in the lowermost mantle: from physical polycrystal plasticity to seismic anisotropy.Earth and Planetary Science Letters, Vol. 306, 1-2, pp. 33-45.MantleD- anisotropy, perovskite
DS201212-0014
2012
Amodeo, J., Carrez, Ph., Cordier, P., Gouriet, K., Kraych, A.Modelling dislocation and plasticity in MgO and MgSiO3 perovskite under lower mantle conditions.emc2012 @ uni-frankfurt.de, 1p. AbstractMantlePerovskite
DS201212-0024
2012
Armstrong, L.S., Walter, M.J.Tetragonal almandine pyrope phase ( TAPP): retrograde Mg-perovskite from subducted oceanic crust?European Journal of Mineralogy, Vol. 24, 4, pp. 587-597.TechnologyPerovskite
DS201212-0025
2012
Armstrong, L.S., Walter, M.J., Tuff, J.R., Lord, O.T., Lennie, A.R., Kleppe, A.K., Clark, S.M.Perovskite phase relations in the system CaO-MgO-TiO2-Si02 and implications for deep mantle lithologies.Journal of Petrology, Vol. 53, 3, pp. 611-635.MantlePerovskite
DS201212-0078
2012
Boffa Ballaran, T., Kurosov, A., Glazyrin, K., Frost, D.J., Merlini, M., Hanfland, M., Caracas, R.Effect of chemistry on the compressibility of silicate perovskite in the lower mantle.Earth and Planetary Science Letters, Vol. 333-334, pp. 181-190.MantlePerovskite
DS201212-0083
2012
Boulard, E., Mao, W.Mg, Fe rich carbonates stability at lower mantle conditions.Goldschmidt Conference 2012, abstract 1p.MantlePerovskite
DS201212-0385
2012
Kudo, Y., Hirose, K.,Murakami, M., Asahara, Y., Ozawa, H., Ohishi, Y., Hirao, N.Sound velocity measurements of CaSiO3 perovskite to 133 Gpa an implications for lowermost mantle seismic anomalies.Earth and Planetary Science Letters, Vol. 349-350 pp. 1-7.MantlePerovskite
DS201212-0468
2012
Metsue, A., Tsuchiya, T.Thermodynamic properties of perovskite at the lower mantle pressures and temperatures: an internally consistent LSDA study.Geophysical Journal International, Vol. 190, 1, pp. 310-322.MantlePerovskite
DS201212-0503
2012
Murakami, M., Ohishi, Y., Hirao, N., Hirose, K.A perovskite lower mantle inferred from high pressure, high temperature sound velocity data.Journal of the Geological Society of India, Vol. 80, 1, p. 147. Brief reviewMantlePerovskite
DS201212-0504
2012
Murakami, M., Ohishi, Y., Hirao, N., Hirose, K.A perovskite lower mantle inferred from high pressure, high temperature sound velocity data.Nature, Vol. 485, May 3, pp. 90-94.MantlePerovskite
DS201212-0717
2012
Tange, Y., Kuwayma, Y., Irifune, T., Funakoshi, K-I., Ohishi, Y.P-V-T equation of state of MgSiO3 perovskite based on the MgO pressure scale: a comprehensive reference for mineralogy of the lower mantle.Journal of Geophysical Research, Vol. 117, B6, B06201MantlePerovskite
DS201312-0142
2013
Chalapathi Rao, N.V., Wu, F-Y., Mitchell, R.H., Li, Q-L., Lehmann, B.Mesoproterozoic U-Pb ages, trace element and Sr-Nd isotopic composition of perovskite from kimberlites of the Eastern Dharwar craton, southern India: distinct mantle sources and a Wide spread 1.1 Ga Tectonomagmatic event.Chemical Geology, Vol. 353, pp. 48-64.IndiaPerovskite ages, SCLM
DS201312-0380
2013
Hernandez, E.R., Alfe, D., Brodholt, J.The in corporation of water into lower mantle perovskites: a first principles study.Earth and Planetary Science Letters, Vol. 364, pp. 37-43.MantlePerovskite
DS201312-0828
2013
Sinmyo, R., Hirose, K.Iron partitioning in pyrolitic lower mantle.Physics and Chemistry of Minerals, Vol. 40, 2, pp. 107-113.MantlePerovskite, mineral chemistry
DS201312-0946
2013
Walker, A.M., Ammann, M.W., Stackhouse, S., Wookey, J., Bordholdt, J.P., Dobson, D.Anisotropy: a cause of heat flux variation at the CMB?Goldschmidt 2013, 1p. AbstractMantlePerovskite
DS201312-0956
2013
Wang, Y., Hilairet, N., Nishiyama, N., Yahata, N., Tsuchiya, T., Morad, G., Fiquet, G.High pressure, high temperature deformation of CaGeO3 ( perovskite) +-MgO aggregates: implications for multiphase rheology of the lower mantle.Geochemistry, Geophysics, Geosystems: G3, Vol. 14, 9, pp. 3389-3408.MantlePerovskite
DS201312-1013
2013
Zhang, Z., Stixrude, L., Brodholt, J.Elastic properties of MgSiO3 perovskite under lower mantle conditions and the composition of the deep Earth.Earth and Planetary Science Letters, Vol. 379, pp. 1-12.MantlePerovskite
DS201412-0114
2014
Chakhmouradian, A.R., Woodward, P.M.Celebrating 175 years of perovskite research: a tribute to Roger H. Mitchell.Physics and Chemistry of Minerals, 6p. In press availableTechnologyPerovskite
DS201412-0297
2014
Glazyrin, K., Boffa Ballaran, T., Frost, D.J., McCammon, C., Kantor, A., Merlini, M., Hanfland, M., Dubrovinsky, L.Magnesium silicate perovskite and effect of iron oxidation state on its bulk sound velocity at the conditions of the lower mantle.Earth and Planetary Science Letters, Vol. 393, pp. 182-186.MantlePerovskite
DS201412-0355
2014
Higo, Y., Matsui, M., Irifune, T.Development of ultrasonic measurement technique under lower mantle conditions.V.S. Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of Sciences International Symposium Advances in high pressure research: breaking scales and horizons ( Courtesy of N. Poikilenko), Held Sept. 22-26, 1p. AbstractTechnologyPerovskite
DS201412-0445
2014
Kato, T., Kinoshita, Y., Nishiyama, N., Wada, K., Zhou, C., Irifune, T.Magnesium silicate perovskite coexisting with ring woodite in harzburgite stagnated at the lowermost mantle transition zone.Physics and Chemistry of the Earth Parts A,B,C, Vol. 232, pp. 26-29.MantlePerovskite
DS201412-0547
2014
Mao, Z., Lin, J-F., Yang, J., Bian, H., Liu, J., Watson, H.C., Huang, S., Chen, J., Prakapenka, V.B., Xiao, Y., Chow, P.Fe, Al bearing post-perovskite in the Earth's lower mantle.Earth and Planetary Science Letters, Vol. 403, pp. 157-163.MantlePerovskite
DS201412-0566
2013
McCammon, C., Glazyrin, K., Kantor, A., Kantor, I., Kupenko, I., Narygina, O., Potapin, V., Vasily, P., Sinmyo, C., Chumakov, Ruffer, Sergueev, Smirnov, DubrovinskyIron spin state in silicate perovskite at conditions of Earth's deep interior.International Journal of High Pressure Research, Vol. 33, 3, pp. 663-672.MantlePerovskite
DS201412-0812
2014
Shimojuku, A., Boujibar, A., Yamazaki, D.Growth of ring woodite reaction rims from MgSiO3 perovskite and periclase at 22.5 Gpa and 1,800 C.Physics and Chemistry of Minerals, Vol. 41, 7, pp. 555-567.TechnologyPerovskite
DS201412-1024
2014
Zhang, L., Meng, Y., Yang, W.,Wang, L., Mao, W.L., Zeng, Q-S., Jeong, J.S., Wagner, A.J., Mkhoyan, K.A., Liu, W., Xu, R., Mao, H-K.Disproportionation of (Mg,Fe) SiO3 perovskite in Earth's deep lower mantle.Science, Vol. 344, no. 6186, pp. 877-882.MantlePerovskite
DS201502-0055
2015
Dorogokupets, P.I., Dymshits, A.M., Sokolova, T.S., Danilov, B.S., Litasov, K.D.The equations of state of forsterite, wadsleyite, ringwoodite, akimotoite, Mg2SiO4 perovskite and post perovskite and phase diagram for the Mg2SiO4 system at pressures of up to 130 Gpa.Russian Geology and Geophysics, Vol. 56, 1-2, pp. 172-189.TechnologyPerovskite
DS201504-0212
2015
Panero, W.R., Pigott, J.S., Reaman, D.M., Kabbes, J.E., Liu, Z.Dry ( Mg,Fe) SiO3 perovskite in the Earth's lower mantle.Journal of Geophysical Research, Vol. 120, 2, pp. 894-908.MantlePerovskite
DS201512-1975
2015
Szuromi, P.Solar cells. Perovskites go large.Science, Vol. 350, 6263, p. 923.TechnologyPerovskite
DS201603-0399
2016
Merli, M., Bonadiman, C., Diella, V., Pavese, A.Lower mantle hydrogen partitioning between periclase and perovskite: a quantum chemical modelling.Geochimica et Cosmochimica Acta, Vol. 173, pp. 304-318.MantlePerovskite

Abstract: Partitioning of hydrogen (often referred to as H2O) between periclase (pe) and perovskite (pvk) at lower mantle conditions (24-80 GPa) was investigated using quantum mechanics, equilibrium reaction thermodynamics and by monitoring two H-incorporation models. One of these (MSWV) was based on replacements provided by Mg2+ ? 2H+ and Si4+ ? 4H+; while the other (MSWA) relied upon substitutions in 2Mg2+ ? Al3+ + H+ and Si4+ ? Al3+ + H+. H2O partitioning in these phases was considered in the light of homogeneous (Bulk Silicate Earth; pvk: 75%-pe:16% model contents) and heterogeneous (Layered Mantle; pvk:78%-pe:14% modal contents) mantle geochemical models, which were configured for lower and upper bulk water contents (BWC) at 800 and 1500 ppm, respectively. The equilibrium constant, BWCK(P,T), for the reactions controlling the H-exchange between pe and pvk exhibited an almost negligible dependence on P, whereas it was remarkably sensitive to T, BWC and the hydrogen incorporation scheme. Both MSWV and MSWA lead to BWCK(P,T) ? 1, which suggests a ubiquitous shift in the exchange reaction towards an H2O-hosting perovskite. This took place more markedly in the latter incorporation mechanism, indicating that H2O-partitioning is affected by the uptake mechanism. In general, the larger the BWC, the smaller the BWCK(P,T). Over the BWC reference range, MSWV led to BWCK(P,T)-grand average (?BWCK?) calculated along lower mantle P-T-paths of ?0.875. With regard to the MSWA mechanism, ?BWCK? was more sensitive to BWC (and LM over BSE), but its values remained within the rather narrow 0.61-0.78 range. The periclase-perovskite H2O concentration-based partition coefficient, View the MathML sourceKdH2Ope/pvk, was inferred using ?BWCK ?, assuming both hydrous and anhydrous-dominated systems. MSWV revealed a View the MathML sourceKdH2Ope/pvk-BWC linear interpolation slope which was close to 0 and View the MathML sourceKdH2Ope/pvk values of 0.36 and 0.56 (for anhydrous and hydrous system, respectively). MSWA, in turn, yielded a View the MathML sourceKdH2Ope/pvk trend with a slightly steeper negative BWC -slope, while it may also be considered nearly invariant with View the MathML sourceKdH2Ope/pvk values of 0.31-0.47 in the 800-1500 ppm interval. Combining the MSWV and MSWA results led to the supposition that View the MathML sourceKdH2Ope/pvk lies in the narrow 0.31-0.56 interval, as far as the P-T-BWC values of interest are concerned. This implies that water always prefers pvk to pe. Furthermore, it also suggests that even in lower mantle with low or very low bulk water content, periclase rarely becomes a pure anhydrous phase.
DS201603-0419
2016
Shang, R., Chen, S., Wang, B-W., Wang, Z-M., Gao, S.Temperature induced irreversible phase transition from perovskite to diamond but pressure-driven back-transition in an ammonium copper formate.Angewandte Chemie, Vol. 18. 6. pp. 2137-2140.TechnologyPerovskite

Abstract: The compound [CH3 CH2 NH3 ][Cu(HCOO)3 ] undergoes a phase transition at 357 K, from a perovskite to a diamond structure, by heating. The backward transition can be driven by pressure at room temperature but not cooling under ambient or lower pressure. The rearrangement of one long copper-formate bond, the switch of bridging-chelating mode of the formate, the alternation of N-H???O H-bonds, and the flipping of ethylammonium are involved in the transition. The strong N-H???O H-bonding probably locks the metastable diamond phase. The two phases display magnetic and electric orderings of different characters.
DS201606-1086
2016
Feng, D., Maram, P.S., Mielewczyk-Gryn, A., Navotsky, A.Thermochemistry of rare earth perovskites Na3xRE.067-xTiO3 ( Re=La, Ce)American Mineralogist, Vol. 101, 5, pp. 1125-1128.TechnologyPerovskite
DS201611-2145
2016
Tsujino, N., Yamazaki, D., Takahashi, E.Mantle dynamics inferred from the crystallographic preferred orientation of bridgmanite.Nature, Oct. 20, 15p.MantlePerovskite

Abstract: Seismic shear wave anisotropy1, 2, 3, 4, 5, 6 is observed in Earth’s uppermost lower mantle around several subducted slabs. The anisotropy caused by the deformation-induced crystallographic preferred orientation (CPO) of bridgmanite (perovskite-structured (Mg,Fe)SiO3) is the most plausible explanation for these seismic observations. However, the rheological properties of bridgmanite are largely unknown. Uniaxial deformation experiments7, 8, 9 have been carried out to determine the deformation texture of bridgmanite, but the dominant slip system (the slip direction and plane) has not been determined. Here we report the CPO pattern and dominant slip system of bridgmanite under conditions that correspond to the uppermost lower mantle (25 gigapascals and 1,873 kelvin) obtained through simple shear deformation experiments using the Kawai-type deformation-DIA apparatus10. The fabrics obtained are characterized by [100] perpendicular to the shear plane and [001] parallel to the shear direction, implying that the dominant slip system of bridgmanite is [001](100). The observed seismic shear- wave anisotropies near several subducted slabs1, 2, 3, 4 (Tonga-Kermadec, Kurile, Peru and Java) can be explained in terms of the CPO of bridgmanite as induced by mantle flow parallel to the direction of subduction.
DS201612-2316
2016
Li, Q., Li, X., Wu, F., Liu, Y., Tang, G.Accessory minerals SIMS U-Th-Pb dating for kimberlite and lamproite. Mengin, Shandong; Dahongshan, Hubei.Acta Geologica Sinica, Vol. 90, July abstract p. 74-75.ChinaPerovskite
DS201703-0429
2017
Popova, E., Lushnikov, S.G., Yakovenchuk, V.N.The crystal structure of loparite: a new acentric variety.Mineralogy and Petrology, in press availablePerovskite, REE

Abstract: The crystal structure of the cubic modification of the natural mineral loparite has been studied for the first time by the methods of the X-ray diffraction analysis (?MoK ? radiation, 105 independent reflections with I > 3?(I), R = 0.041 in the anisotropic approximation). The structure belongs to the perovskite type (ABO 3) with the double period of the cubic unit cell, a = 7.767(1) Å (sp. gr. Pn3m; Z = 2 for the composition (Ca,Na,Ce)(Na,Ce)3(Ti,Nb)2Ti2O12. Period doubling is explained by ordering of cations both in the A and the B positions.
DS201705-0856
2017
Mitchell, R.H., Welch, M.D., Chakhmouradian, A.R.Nomenclature of the perovskite supergroup: a heirarchical system of classification based on crystal structure and composition.Mineralogical Magazine, Vol. 81, 3, pp. 411-461.TechnologyPerovskite

Abstract: On the basis of extensive studies of synthetic perovskite-structured compounds it is possible to derive a hierarchy of hettotype structures which are derivatives of the arisotypic cubic perovskite structure (ABX3), exemplified by SrTiO3 (tausonite) or KMgF3 (parascandolaite) by: (1) tilting and distortion of the BX6 octahedra; (2) ordering of A- and B-site cations; (3) formation of A-, B- or X-site vacancies. This hierarchical scheme can be applied to some naturally-occurring oxides, fluorides, hydroxides, chlorides, arsenides, intermetallic compounds and silicates which adopt such derivative crystal structures. Application of this hierarchical scheme to naturally-occurring minerals results in the recognition of a perovskite supergroup which is divided into stoichiometric and non-stoichiometric perovskite groups, with both groups further divided into single ABX3 or double A2BB?X6 perovskites. Subgroups, and potential subgroups, of stoichiometric perovskites include: (1) silicate single perovskites of the bridgmanite subgroup; (2) oxide single perovskites of the perovskite subgroup (tausonite, perovskite, loparite, lueshite, isolueshite, lakargiite, megawite); (3) oxide single perovskites of the macedonite subgroup which exhibit second order Jahn-Teller distortions (macedonite, barioperovskite); (4) fluoride single perovskites of the neighborite subgroup (neighborite, parascandolaite); (5) chloride single perovskites of the chlorocalcite subgroup; (6) B-site cation ordered double fluoride perovskites of the cryolite subgroup (cryolite, elpasolite, simmonsite); (7) B-site cation ordered oxide double perovskites of the vapnikite subgroup [vapnikite, (?) latrappite]. Non-stoichiometric perovskites include: (1) A-site vacant double hydroxides, or hydroxide perovskites, belonging to the söhngeite, schoenfliesite and stottite subgroups; (2) Anion-deficient perovskites of the brownmillerite subgroup (srebrodolskite, shulamitite); (3) A-site vacant quadruple perovskites (skutterudite subgroup); (4) B-site vacant single perovskites of the oskarssonite subgroup [oskarssonite]; (5) B-site vacant inverse single perovskites of the cohenite and auricupride subgroups; (6) B-site vacant double perovskites of the diaboleite subgroup; (7) anion-deficient partly-inverse B-site quadruple perovskites of the hematophanite subgroup.
DS201708-1579
2017
Mitchell, R.H., Welch, M.D., Chakhmouradian, A.R.Nomenclature of the perovskite supergroup: a hierachial system of classification based on crystal structure composition.Mineralogical Magazine, Vol. 81, 3, pp. 411-416.Technologyperovskite

Abstract: On the basis of extensive studies of synthetic perovskite-structured compounds it is possible to derive a hierarchy of hettotype structures which are derivatives of the arisotypic cubic perovskite structure (ABX3), exemplified by SrTiO3 (tausonite) or KMgF3 (parascandolaite) by: (1) tilting and distortion of the BX6 octahedra; (2) ordering of A- and B-site cations; (3) formation of A-, B- or X-site vacancies. This hierarchical scheme can be applied to some naturally-occurring oxides, fluorides, hydroxides, chlorides, arsenides, intermetallic compounds and silicates which adopt such derivative crystal structures. Application of this hierarchical scheme to naturally-occurring minerals results in the recognition of a perovskite supergroup which is divided into stoichiometric and non-stoichiometric perovskite groups, with both groups further divided into single ABX3 or double A2BB?X6 perovskites. Subgroups, and potential subgroups, of stoichiometric perovskites include: (1) silicate single perovskites of the bridgmanite subgroup; (2) oxide single perovskites of the perovskite subgroup (tausonite, perovskite, loparite, lueshite, isolueshite, lakargiite, megawite); (3) oxide single perovskites of the macedonite subgroup which exhibit second order Jahn-Teller distortions (macedonite, barioperovskite); (4) fluoride single perovskites of the neighborite subgroup (neighborite, parascandolaite); (5) chloride single perovskites of the chlorocalcite subgroup; (6) B-site cation ordered double fluoride perovskites of the cryolite subgroup (cryolite, elpasolite, simmonsite); (7) B-site cation ordered oxide double perovskites of the vapnikite subgroup [vapnikite, (?) latrappite]. Non-stoichiometric perovskites include: (1) A-site vacant double hydroxides, or hydroxide perovskites, belonging to the söhngeite, schoenfliesite and stottite subgroups; (2) Anion-deficient perovskites of the brownmillerite subgroup (srebrodolskite, shulamitite); (3) A-site vacant quadruple perovskites (skutterudite subgroup); (4) B-site vacant single perovskites of the oskarssonite subgroup [oskarssonite]; (5) B-site vacant inverse single perovskites of the cohenite and auricupride subgroups; (6) B-site vacant double perovskites of the diaboleite subgroup; (7) anion-deficient partly-inverse B-site quadruple perovskites of the hematophanite subgroup.
DS201712-2714
2017
Nomura, R., Zhou, Y., Irifune, T.Melting phase relations in the MgSiO3-CaSiO3 system at 24 Gpa.Progress in Earth and Planetary Science, Vol. 4, pp. 34-MantleBridgmanite, perovskite

Abstract: The Earth’s lower mantle is composed of bridgmanite, ferropericlase, and CaSiO3-rich perovskite. The melting phase relations between each component are key to understanding the melting of the Earth’s lower mantle and the crystallization of the deep magma ocean. In this study, melting phase relations in the MgSiO3-CaSiO3 system were investigated at 24 GPa using a multi-anvil apparatus. The eutectic composition is (Mg,Ca)SiO3 with 81-86 mol% MgSiO3. The solidus temperature is 2600-2620 K. The solubility of CaSiO3 component into bridgmanite increases with temperature, reaching a maximum of 3-6 mol% at the solidus, and then decreases with temperature. The same trend was observed for the solubility of MgSiO3 component into CaSiO3-rich perovskite, with a maximum of 14-16 mol% at the solidus. The asymmetric regular solutions between bridgmanite and CaSiO3-rich perovskite and between MgSiO3 and CaSiO3 liquid components well reproduce the melting phase relations constrained experimentally.
DS201712-2734
2017
Wagner, A.Everything you ever wanted to know about perovskite, Earth's most abundant type of mineral - that we almost never see.Sciencemag.org, Nov. 17, videoTechnologyperovskite

Abstract: Perovskite is one of the most common crystal structures on the planet, but why is it so interesting to researchers from many scientific disciplines? Science looks into the properties of this odd cube of atoms, and what cutting-edge research is being performed on its many varieties.
DS201802-0252
2017
Marchenko, E.I., Eremin, N.N., Bychkov, A.Y., Grechanovskii, A.E.Ca and Mg perovskite phases in the Earth's mantle as a probable reservoir of Al: computer simulated evidence.Moscow University Geology Bulletin, Vol. 72, 5, pp. 299-304.Mantleperovskite

Abstract: Semi-empirical and quantum chemical studies of Al atom energy in CaSiO3 and MgSiO3 with the perovskite-type structure at pressures and temperatures of the Earth’s mantle are reported. The phase diagram for CaSiO3 is reproduced and refined. Probable mechanisms of Al incorporation in the structures studied are considered. According to the results of the calculations, Al is preferably incorporated into MgSiO3, rather than into CaSiO3. Evaluation of the isomorphic capacity of perovskite phases in relation to Al shows that the Al content in MgSiO3 may reach 2.4 mol % at 120 GPa and 2400 K. CaSiO3 cannot be a source of Al atoms in the Earth’s mantle.
DS201803-0462
2017
Lobanov, S.S., Holtgrewe, N., Lin, J-F, Goncharov, A.F.Radiative conductivity and abundance of post perovskite in the lower most mantle.Earth and Planetary Science Letters, Vol. 479, pp. 43-49.Mantleperovskite

Abstract: Thermal conductivity of the lowermost mantle governs the heat flow out of the core energizing planetary-scale geological processes. Yet, there are no direct experimental measurements of thermal conductivity at relevant pressure-temperature conditions of Earth's core-mantle boundary. Here we determine the radiative conductivity of post-perovskite at near core-mantle boundary conditions by optical absorption measurements in a laser-heated diamond anvil cell. Our results show that the radiative conductivity of Mg0.9Fe0.1SiO3 post-perovskite (?1.1 W/m/K) is almost two times smaller than that of bridgmanite (?2.0 W/m/K) at the base of the mantle. By combining this result with the present-day core-mantle heat flow and available estimations on the lattice thermal conductivity we conclude that post-perovskite is at least as abundant as bridgmanite in the lowermost mantle which has profound implications for the dynamics of the deep Earth.
DS201804-0716
2018
Locock, A.J., Mitchell, R.H.Perovskite classification: an excel spreadsheet to determine and depict end member proportions for the perovskite and vapnikite subgroups of the perovskite supergroup.Computers and Geosciences, Vol. 113, pp. 106-114.Technologyperovskite

Abstract: Perovskite mineral oxides commonly exhibit extensive solid-solution, and are therefore classified on the basis of the proportions of their ideal end-members. A uniform sequence of calculation of the end-members is required if comparisons are to be made between different sets of analytical data. A Microsoft Excel spreadsheet has been programmed to assist with the classification and depiction of the minerals of the perovskite- and vapnikite-subgroups following the 2017 nomenclature of the perovskite supergroup recommended by the International Mineralogical Association (IMA). Compositional data for up to 36 elements are input into the spreadsheet as oxides in weight percent. For each analysis, the output includes the formula, the normalized proportions of 15 end-members, and the percentage of cations which cannot be assigned to those end-members. The data are automatically plotted onto the ternary and quaternary diagrams recommended by the IMA for depiction of perovskite compositions. Up to 200 analyses can be entered into the spreadsheet, which is accompanied by data calculated for 140 perovskite compositions compiled from the literature.
DS201805-0981
2018
Sun, N., Wei, W., Han, S., Song, J., Li, X., Duan, Y., Prakapenka, V.B., Mao, Z.Phase transition and thermal equations of state of (Fe, Al) -bridgmanite and post perovskite: implication for the chemical heterogeneity at the lowermost mantle.Earth Planetary Science Letters, Vol. 490, pp. 161-169.Mantleperovskite
DS201806-1231
2018
Koelemeijer, P., Schuberth, B.S.A., Davies, D.R., Deuss, A., Ritsema, J.Constraints on the presence of post-perovskite in Earth's lowermost mantle from tomographic geodynamic model comparisons.Earth and Planetary Science Letters, Vol. 494, pp. 226-238.Mantleperovskite

Abstract: Lower mantle tomography models consistently feature an increase in the ratio of shear-wave velocity () to compressional-wave velocity () variations and a negative correlation between shear-wave and bulk-sound velocity () variations. These seismic characteristics, also observed in the recent SP12RTS model, have been interpreted to be indicative of large-scale chemical variations. Other explanations, such as the lower mantle post-perovskite (pPv) phase, which would not require chemical heterogeneity, have been explored less. Constraining the origin of these seismic features is important, as geodynamic simulations predict a fundamentally different style of mantle convection under both scenarios. Here, we investigate to what extent the presence of pPv explains the observed high ratios and negative - correlation globally. We compare the statistical properties of SP12RTS with the statistics of synthetic tomography models, derived from both thermal and thermochemical models of 3-D global mantle convection. We convert the temperature fields of these models into seismic velocity structures using mineral physics lookup tables with and without pPv. We account for the limited tomographic resolution of SP12RTS using its resolution operator for both and structures. This allows for direct comparisons of the resulting velocity ratios and correlations. Although the tomographic filtering significantly affects the synthetic tomography images, we demonstrate that the effect of pPv remains evident in the ratios and correlations of seismic velocities. We find that lateral variations in the presence of pPv have a dominant influence on the / ratio and - correlation, which are thus unsuitable measures to constrain the presence of large-scale chemical variations in the lowermost mantle. To explain the decrease in the / ratio of SP12RTS close to the CMB, our results favour a pPv-bearing CMB region, which has implications for the stability field of pPv in the Earth's mantle.
DS201807-1508
2018
Liu, H., Wang, W., Jia, X., Leng, W., Wu, Z., Sun, D.The combined effects of post-spinel and post-garnet phase transitions on mantle plume dynamics.Earth and Planetary Science Letters, Vol. 496, pp. 80-88.Mantleperovskite, hotspots

Abstract: Mineralogical studies indicate that two major phase transitions occur near the depth of 660 km in the Earth's pyrolitic mantle: the ringwoodite (Rw) to perovskite (Pv) + magnesiowüstite (Mw) and the majorite (Mj) to perovskite (Pv) phase transitions. Seismological results also show a complicated phase boundary structure at this depth in plume regions. However, previous geodynamical modeling has mainly focused on the effects of the Rw-Pv+Mw phase transition on plume dynamics and has largely neglected the effects of the Mj-Pv phase transition. Here, we develop a 3-D regional spherical geodynamic model to study the combined influence of these two phase transitions on plume dynamics. Our results show the following: (1) A double phase boundary occurs in the high-temperature center of the plume, corresponding to the double reflections in seismic observations. Other plume regions feature a single, flat uplifted phase boundary, causing a gap of high seismic velocity anomalies. (2) Large amounts of relatively low-temperature plume materials can be trapped in the transition zone due to the combined effects of phase transitions, forming a complex truncated cone shape. (3) The Mj-Pv phase transition greatly enhances the plume penetration capability through 660-km phase boundary, which has a significant influence on the plume dynamics. Our results provide new insights which can be used to better constrain the 660-km discontinuity variations, seismic wave velocity structure and plume dynamics in the mantle transition zone. The model can also help to estimate the mantle temperature and Clapeyron slopes at the 660 km phase boundary.
DS201808-1797
2018
Xu, J., Melgarejo, J.C., Castillo-Oliver, M.Styles of alteration of Ti oxides of the kimberlite groundmass: implications on the petrogenesis and classification of kimberlites and similar rocks.Minerals, Vol. 8, 2, pp. 51-66.Indiaperovskite

Abstract: The sequence of replacement in groundmass perovskite and spinel from SK-1 and SK-2 kimberlites (Eastern Dharwar craton, India) has been established. Two types of perovskite occur in the studied Indian kimberlites. Type 1 perovskite is found in the groundmass, crystallized directly from the kimberlite magma, it is light rare-earth elements (LREE)-rich and Fe-poor and its ?NNO calculated value is from ?3.82 to ?0.73. The second generation of perovskite (type 2 perovskite) is found replacing groundmass atoll spinel, it was formed from hydrothermal fluids, it is LREE-free and Fe-rich and has very high ?NNO value (from 1.03 to 10.52). Type 1 groundmass perovskite may be either replaced by anatase or kassite along with aeschynite-(Ce). These differences in the alteration are related to different f(CO2) and f(H2O) conditions. Furthermore, primary perovskite may be strongly altered to secondary minerals, resulting in redistribution of rare-earth elements (REE) and, potentially, U, Pb and Th. Therefore, accurate petrographic and chemical analyses are necessary in order to demonstrate that perovskite is magmatic before proceeding to sort geochronological data by using perovskite. Ti-rich hydrogarnets (12.9 wt %-26.3 wt % TiO2) were produced during spinel replacement by late hydrothermal processes. Therefore, attention must be paid to the position of Ca-Ti-garnets in the mineral sequence and their water content before using them to classify the rock based on their occurrence.
DS201812-2827
2018
Kaminsky, F.V.Water in the Earth's lower mantle.Geochemistry International, Vol. 56, 12, pp. 1117-1134.Mantlebridgmanite, perovskite
DS201907-1544
2019
Extance, A.Perovskites on trial. The reality behind solar power's next star material. Companies say they are close to commercializing cheap perovskite films that could diisrupt solar power - but are they too optimistic?Nature, Vol. 570, June 27, pp. 429-432.Globalperovskites
DS201909-2096
2019
Thomson, A.R., Crichton, W.A., Brodholt, J.P., Wood, I.G., Siersch, N.C., Muir, J.M.R., Dobson, D.P., Hunt, S.A..Seismic velocities of CaSiO3 perovskite can explain LLSVPs in Earth's lower mantle.Nature, Vol. 572, 7769, 18p. PdfMantleperovskite

Abstract: Seismology records the presence of various heterogeneities throughout the lower mantle1,2, but the origins of these signals—whether thermal or chemical—remain uncertain, and therefore much of the information that they hold about the nature of the deep Earth is obscured. Accurate interpretation of observed seismic velocities requires knowledge of the seismic properties of all of Earth’s possible mineral components. Calcium silicate (CaSiO3) perovskite is believed to be the third most abundant mineral throughout the lower mantle. Here we simultaneously measure the crystal structure and the shear-wave and compressional-wave velocities of samples of CaSiO3 perovskite, and provide direct constraints on the adiabatic bulk and shear moduli of this material. We observe that incorporation of titanium into CaSiO3 perovskite stabilizes the tetragonal structure at higher temperatures, and that the material’s shear modulus is substantially lower than is predicted by computations3,4,5 or thermodynamic datasets6. When combined with literature data and extrapolated, our results suggest that subducted oceanic crust will be visible as low-seismic-velocity anomalies throughout the lower mantle. In particular, we show that large low-shear-velocity provinces (LLSVPs) are consistent with moderate enrichment of recycled oceanic crust, and mid-mantle discontinuities can be explained by a tetragonal-cubic phase transition in Ti-bearing CaSiO3 perovskite.
DS202003-0331
2020
Brooks, K.Perovskite.Geology Today, Vol. 36, 1, pp. 33-38. pdfMantleperovskite

Abstract: How many people, even those interested in the Earth sciences, have heard of perovskite? Yet minerals with the perovskite structure are the most abundant minerals on the Earth with a corresponding importance for our understanding of the origin, development and functioning of our planet. Furthermore, they play important roles in modern technology, including the storage of nuclear waste, in solar cells and as superconductors.
DS202003-0357
2020
Potter, N.J., Kamenetsky, V.S., Chakhmouradian, A.R., Kamenetsky, M.B., Goemann, K., Rodemann, T.Polymineralic inclusions in oxide minerals of the Afrikanda alkaline ultramafic complex: implications for the evolution of perovskite mineralization.Contributions to Mineralogy and Petrology, Vol. 175, 13p. PdfRussiaperovskite

Abstract: The exceptional accumulation of perovskite in the alkaline-ultramafic Afrikanda complex (Kola Peninsula, Russia) led to the study of polymineralic inclusions hosted in perovskite and magnetite to understand the development of the perovskite-rich zones in the olivinites, clinopyroxenites and silicocarbonatites. The abundance of inclusions varies across the three perovskite textures, with numerous inclusions hosted in the fine-grained equigranular perovskite, fewer inclusions in the coarse-grained interlocked perovskite and rare inclusions in the massive perovskite. A variety of silicate, carbonate, sulphide, phosphate and oxide phases are assembled randomly and in variable proportions in the inclusions. Our observations reveal that the inclusions are not bona fide melt inclusions. We propose that the inclusions represent material trapped during subsolidus sintering of magmatic perovskite. The continuation of the sintering process resulted in the coarsening of inclusion-rich subhedral perovskite into inclusion-poor anhedral and massive perovskite. These findings advocate the importance of inclusion studies for interpreting the origin of oxide minerals and their associated economic deposits and suggest that the formation of large scale accumulations of minerals in other oxide deposits may be a result of annealing of individual disseminated grains.
DS202007-1152
2020
Juarez-Perez, E., Haro, M.Perovskite cells take a step forward.Science, Vol 368, 6497, p. 1309.Globalperovskite

Abstract: Today's monocrystalline silicon solar cells have their throne on the roofs of our houses. In the past decade, however, perovskite solar cells (PSCs) show impressive advances with a high power conversion efficiency (PCE) of 25.2% (1) and low fabrication cost, which make this technology promising for further advances in decarbonization energy models (2). Yet the life cycle of PSCs needs to be increased for market integration. Poor stability is the main impediment to commercializing this technology. Thus, great effort has been focused on the causes and mechanisms of degradation, many of which can be mitigated or minimized with encapsulation. Various strategies have been proposed to increase PSCs' operational stability, which is affected by moisture, oxidation, heat, light, and other factors (3, 4). On page 1328 of this issue, Shi et al. (5) report a successful encapsulation procedure for hybrid PSCs.
DS202009-1649
2020
Okuda, Y., Ohta, K., Haseawa, A., Yagi, T., Hirose, K., Kawaguchi, S.I., Ohishi, Y.Thermal conductivity of Fe bearing post- perovskite in the Earth's lowermost mantle.Earth and Planetary Science Letters, Vol. 547, 9p. PdfMantleperovskite

Abstract: The thermal conductivity of post-perovskite (ppv), the highest-pressure polymorph of MgSiO3 in the Earth's mantle, is one of the most important transport properties for providing better constraints on the temperature profile and dynamics at the core-mantle boundary (CMB). Incorporation of Fe into ppv can affect its conductivity, which has never been experimentally investigated. Here we determined the lattice thermal conductivities of ppv containing 3 mol% and 10 mol% of Fe at high P-T conditions - of pressures up to 149 GPa and 177 GPa, respectively, and temperatures up to 1560 K - by means of the recently developed pulsed light heating thermoreflectance technique combining continuous wave heating lasers. We found that the incorporation of Fe into ppv moderately reduces its lattice thermal conductivity as it increases the Fe content. The bulk conductivity of ppv dominant pyrolite is estimated as 1.5 times higher than that of pyrolite consisting of bridgmanite and ferropericlase in the lower mantle, which agrees with the traditional view that ppv acts as a better heat conductor than bridgmanite in the Earth's lowermost mantle.
DS202102-0176
2021
Brenker, F.E., Nestola, F., Brenker, L., Peruzo, L., Harris, J.WOrigin, properties, and structure of breyite: the second most abundant mineral inclusion in super-deep diamonds.The American Mineralogist, Vol. 106, pp. 38-43. pdfMantleperovskites, mineral inclusions

Abstract: Earth's lower mantle most likely mainly consists of ferropericlase, bridgmanite, and a CaSiO3- phase in the perovskite structure. If separately trapped in diamonds, these phases can be transported to Earth's surface without reacting with the surrounding mantle. Although all inclusions will remain chemically pristine, only ferropericlase will stay in its original crystal structure, whereas in almost all cases bridgmanite and CaSiO3-perovskite will transform to their lower-pressure polymorphs. In the case of perovskite structured CaSiO3, the new structure that is formed is closely related to that of walstromite. This mineral is now approved by the IMA commission on new minerals and named breyite. The crystal structure is triclinic (space group: P1) with lattice parameters a0 = 6.6970(4) Å, b0 = 9.2986(7) Å, c0 = 6.6501(4) Å, ? = 83.458(6)°, ? = 76.226(6)°, ? = 69.581(7)°, and V = 376.72(4) Å. The major element composition found for the studied breyite is Ca3.01(2)Si2.98(2)O9. Breyite is the second most abundant mineral inclusion after ferropericlase in diamonds of super-deep origin. The occurrence of breyite has been widely presumed to be a strong indication of lower mantle (=670 km depth) or at least lower transition zone (=520 km depth) origin of both the host diamond and the inclusion suite. In this work, we demonstrate through different formation scenarios that the finding of breyite alone in a diamond is not a reliable indicator of the formation depth in the transition zone or in the lower mantle and that accompanying paragenetic phases such as ferropericlase together with MgSiO3 are needed.
DM202105-0844
2021
Metcalfe, T.Solar panels are reaching their limit. These crystals could change that.nbcnews.com, Apr. 19, 2p.GlobalNews item - perovskite
DS202111-1759
2021
Britvin, S., Vlasenko, N.S., Aslandukov, A., Aslandova, A., Dubovinsky, L., Gorelova, L.A., Krzhizhanvskaya, M.G., Vereshchagin, O.S., Bocharov, V.N., Shelukina, Y.S., Lozhkin, M.S., Zaitsev, A.N., Nestola, F.Natural cubic perovskite, Ca(Ti,Si,Cr) O 3-delta, a versatile potential host rock-forming and less common elements up to Earth's mantle pressure.American Mineralogist, doi:10.2138/am-2022-8186 in pressMantleperovskite

Abstract: Perovskite, CaTiO3, originally described as a cubic mineral, is known to have a distorted (orthorhombic) crystal structure. We herein report on the discovery of natural cubic perovskite. This was identified in gehlenite rocks occurring in a pyrometamorphic complex of the Hatrurim Formation (the Mottled Zone), in the vicinity of the Dead Sea, Negev Desert, Israel. The mineral is associated with native ?-(Fe,Ni) metal, schreibersite (Fe3P) and Si-rich fluorapatite. The crystals of this perovskite reach 50 ?m in size and contain many micron sized inclusions of melilite glass. The mineral contains significant amounts of Si substituting for Ti (up to 9.6 wt.% SiO2) corresponding to 21 mol.% of the davemaoite component (cubic perovskite-type CaSiO3), in addition to up to 6.6 wt.% Cr2O3. Incorporation of trivalent elements results in the occurrence of oxygen vacancies in the crystal structure; this being the first example of natural oxygen-vacant ABO3 perovskite with the chemical formula Ca(Ti,Si,Cr)O3-? (? ~ 0.1). Stabilization of cubic symmetry (space group Pm?3m) is achieved via the mechanism not reported so far for CaTiO3, namely displacement of an oxygen atom from its ideal structural position (site splitting). The mineral is stable at atmospheric pressure to 1250±50 °C; above this temperature its crystals fuse with the embedded melilite glass, yielding a mixture of titanite and anorthite upon melt solidification. The mineral is stable upon compression to at least 50 GPa. The a lattice parameter exhibits continuous contraction from 3.808(1) Å at atmospheric pressure to 3.551(6) Å at 50 GPa. The second-order truncation of the Birch-Murnaghan equation of state gives the initial volume V0 equal to 55.5(2) Å3 and room temperature isothermal bulk modulus K0 of 153(11) GPa. The discovery of oxygen-deficient single perovskite suggests previously unaccounted ways for incorporation of almost any element into the perovskite framework up to pressures corresponding to those of the Earth’s mantle.
DS202204-0523
2022
Immoor, J., Miyagi, L., Liermann, H-P., Speziale, S., Schulkze, K., Buchen, J., Kurnosov, A., Marquardt, H.Weak cubic CaSi0s perovskite in the Earth's mantle.Nature , Vol. 603, pp. 276-279. 10.1038/s41586-021-04378-2Mantleperovskite

Abstract: Cubic CaSiO3 perovskite is a major phase in subducted oceanic crust, where it forms at a depth of about 550 kilometres from majoritic garnet1,2,28. However, its rheological properties at temperatures and pressures typical of the lower mantle are poorly known. Here we measured the plastic strength of cubic CaSiO3 perovskite at pressure and temperature conditions typical for a subducting slab up to a depth of about 1,200 kilometres. In contrast to tetragonal CaSiO3, previously investigated at room temperature3,4, we find that cubic CaSiO3 perovskite is a comparably weak phase at the temperatures of the lower mantle. We find that its strength and viscosity are substantially lower than that of bridgmanite and ferropericlase, possibly making cubic CaSiO3 perovskite the weakest lower-mantle phase. Our findings suggest that cubic CaSiO3 perovskite governs the dynamics of subducting slabs. Weak CaSiO3 perovskite further provides a mechanism to separate subducted oceanic crust from the underlying mantle. Depending on the depth of the separation, basaltic crust could accumulate at the boundary between the upper and lower mantle, where cubic CaSiO3 perovskite may contribute to the seismically observed regions of low shear-wave velocities in the uppermost lower mantle5,6, or sink to the core-mantle boundary and explain the seismic anomalies associated with large low-shear-velocity provinces beneath Africa and the Pacific7-9.
DS202205-0716
2022
Shim, S-H., Chizmeshya, A., Leinenweber, K.Water in the crystal structure of CaSiO3 perovskite.American Mineralogist, Vol. 107, pp. 631-641.Mantleperovskite

Abstract: While the water storage capacities of the upper 700 km depths of the mantle have been constrained by high-pressure experiments and diamond inclusion studies, the storage capacity of the lower mantle remains controversial. A recent high-pressure experimental study on CaSiO3 perovskite, which is the third most abundant mineral in the lower mantle, reported possible storage of H2O up to a few weight percent. However, the substitution mechanism for H in this phase remains unknown. We have conducted a series of density functional theory calculations under static-lattice conditions and high pressures to elucidate hydration mechanisms at the atomic scale. All of the possible dodecahedral (Ca2+ ? 2H+) and octahedral (Si4+ ? 4H+) substitution configurations for a tetragonal perovskite lattice have very small energy differences, suggesting the coexistence of multiples of H configurations in CaSiO3 perovskite at mantle pressures and temperatures. The dodecahedral substitutions decrease the bulk modulus, resulting in a smaller unit-cell volume of hydrous CaSiO3 perovskite under pressure, consistent with the experimental observations. Although the octahedral substitutions also decrease the bulk modulus, they increase the unit-cell volume at 1 bar. The H atoms substituted in the dodecahedral sites develop much less hydrogen bonding with O atoms, leading to a large distortion in the neighboring SiO6 octahedra. Such distortion may be responsible for the non-cubic peak splittings observed in experiments on hydrous CaSiO3 perovskite. Our calculated infrared spectra suggest that the observed broad OH modes in CaSiO3 perovskite can result from the existence of multiples of H configurations in the phase. Combined with the recent experimental results, our study suggests that CaSiO3 can be an important mineral phase to consider for the H2O storage in the lower mantle.

 
 

You can return to the Top of this page


Copyright © 2024 Kaiser Research Online, All Rights Reserved