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SDLRC - Diamond - Luminescence


The Sheahan Diamond Literature Reference Compilation - Scientific and Media Articles based on Major Keyword - Diamond - Luminescence
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.

Diamond - Luminescence has nothing do with the ability of a diamond to reflect light, but rather with the ability to emit a "cold light" as a result of an energy stimulus. The Fluorescent Mineral Society provides explanations for the various forms of luminescence.

Diamond - Luminescence
Posted/
Published
AuthorTitleSourceRegionKeywords
DS1960-1196
1969
Raman, C.V.The Diamond (1969)Unknown, 246P.GlobalPhysics, Infrared, Luminescence, Morphology
DS1960-1232
1969
Yeremenko, G.K., Polkanov, YU.A.Luminescence of Small Diamonds from Sandy Sediments of the Ukraine.Doklady Academy of Science USSR, Earth Science Section., Vol. 188, No. 4, PP. 149-151.RussiaKimberlite, Photoluminescence, Colour
DS1982-0435
1982
Metalidi, S.V., Zaritskiy, A.I., Tsymbal, S.N., et al.First Discovery of Diamonds in Upper Proterozoic Conglomerates of East European PlatformMineral. Zhurnal, Vol. 4, No. 3, PP. 20-29.RussiaMineralogy, Spectra, Luminescence
DS1985-0534
1985
Plotnikova, S.P., Dudenov, YU.A., Malanina, R.V., Kulakov, V.M.The internal structure and properties of a variety of diamond of cubichabit.(Russian)Kristallografiya, (Russian), Vol. 30, No. 6, pp. 1140-1144RussiaDiamond Luminescence, Diamond Morphology
DS1986-0056
1986
Bartoshinskiy, Z.V., Bekesha, S.N., Vinnichenko, T.G.Types of photoluminesence spectra of Yakutia diamond. (Russian)Mineral. Zhurnal., (Russian), Vol. 40, No. 1, pp. 32-38RussiaDiamond morphology, Luminesence
DS1987-0111
1987
Collins, A.T.Cathodluminescence decay time studies of the neutral vacancy in diamondJournal of Phys. C. Solid State Physics, Vol. 20, No. 13, pp. 2027-2033GlobalLuminescence, Natural diamond
DS1988-0360
1988
Klyuev, Yu.A., Galymova, A., Korneeva, I.I., Naletov, A.M., NepshaPhotoluminescence tomography as a method to image point defect distributions in crystals- nitrogen-vacancy pairs in syntheticdiamonds*technical noteNov. Obl. Primeniya Tekn.Almazov, (Russian), pp. 24-30RussiaLuminescence
DS1988-0643
1988
Smirnov, G.I., Klyuev, Yu.A., Kaminiskii, F.V.Structure of diamonds from the Lesotho kimberlites. (Russian)Mineral. Zhurn., (Russian), Vol. 10, No. 5, pp. 63-68RussiaDiamond luminesence, Diamond morphology
DS1988-0725
1988
Vanenckevort, W.J.P., Lochs, H.G.M.Photoluminescence determination of the nitrogen a -defect content indiamonds.(Russian)Journal of Applied Physics, Vol. 64, No. 1, July 1, pp. 436-437GlobalDiamond synthesis, Photoluminescence
DS1988-0735
1988
Vins, V.G., Eliseev, A.P., et al.Optical spectroscopy of neutron irradiated synthetic diamonds.(Russian)Sverkhtverd. Mater. (Russian), No. 4, pp. 18-22GlobalLuminesence, Spectrometry
DS1989-0119
1989
Bille, C., Chapoulie, R., Dorbes, J., Schvoerer, M.Reconnaissance d'un diamant de synthese de Beers parmi d'autres gemmes grace a la cathodluminescence.(in French)Revue de Gemmologie, (in French), No. 100, pp. 19-21GlobalNatural diamonds, Luminesence
DS1989-0836
1989
Kulakov, V.M., Plotnikova, S.P., Sedova, Ye.A.Optical and luminesence properties of unique Diamonds from the diamond fund of the USSR.(Russian)Mineral. Zhurnal., (Russian), Vol. 11, No. 5, pp. 73-80RussiaDiamond morphology, Luminescence
DS1989-1566
1989
Votyakov, S.L., Ilupin, I.P., Krasnobaev, A.A., Krokhalev, V.Ya.ESR and luminescence of zircons and apatites from kimberlites of SiberiaGeochemistry International (Geokhimiya), (Russian), No. 1, pp. 29-35RussiaLuminescence, Zircons, apatite
DS1989-1677
1989
Zaytseva, T.M., Konstantinova, A.F.Anisotropy of optical properties of natural diamonds. (Russian)Mineral. Zhurnal., (Russian), Vol. 11, No. 5, pp. 68-73RussiaDiamond morphology, Luminescence
DS1990-0173
1990
Bartoshinsky, Z.V., Bekesha, S.N., et al.Luminesence kinetics of N3 centers of natural diamond.(Russian)Mineral. Zhurn., (Russian), Vol. 12, No. 6, December pp. 85-87RussiaMineralogy, Diamond luminesence
DS1990-0593
1990
Graham, R., Buseck, P.R.Cathodluminescence of colored diamonds by transmissionelectronmicroscopyGeological Association of Canada (GAC)/Mineralogical Association of Canada (MAC) Vancouver 90 Program with Abstracts, Held May 16-18, Vol. 15, p. A50. AbstractGlobalDiamond morphology, Cathodluminescence
DS1990-0790
1990
Just, J.Cathodluminescence of diamondsInternational Mineralogical Association Meeting Held June, 1990 Beijing China, Vol. 1, extended abstract p. 182-184GlobalDiamond morphology, Cathodluminescence
DS1990-1503
1990
Vaneneckevort, W.J.P., Visser, E.P.Photoluminesence microtomography of diamondPhil. Magazine B., Vol. 62, No. 6, December pp. 597-614GlobalDiamond morphology, Luminesence
DS1990-1623
1990
Zezin, R.B., Saparin, G.V., Smirnova, E.P., Obyden, S.K., ChukichevCathodluminescence of natural diamonds from Jakutian depositsScanning, Vol. 12, No.6, Nov-Dec. pp. 326-333RussiaDiamond morphology, Cathodluminescence
DS1991-1333
1991
Pereira, E., Monteiro, T.Delayed luminescence of the H-3 center in diamondJournal of Luminesence, Vol. 48-9, Jan.-Feb., pp. 814-818GlobalLuminesence, Diamond -H-3 center
DS1992-0107
1992
Behr, H.J.Paleopermeability and fluid flow in crystalline bedrockEarth Science Reviews, Vol. 32, pp. 131-132GlobalCathodluminescence, Fluid flow
DS1992-1217
1992
Ponahlo, J.Cathodluminescence (CL) and CL spectra of de Beers' experimental syntheticdiamondsJournal of Gemology, Vol. 23, No. 1, January pp. 3-18GlobalSynthetic diamonds, Chlorine, Cathodluminescence
DS1992-1310
1992
Ruan, J., Kobashi, K., Choyke, W.J.On the band -A emission and boron related luminescence in diamondApplied Phys. Letters, Vol. 60, No. 25, June 22, pp. 3138-3140. # HZ 537GlobalDiamond morphology, Luminescence
DS1992-1733
1992
Zezin, R.B., Smirnova, E.P., Saparin, G.V., Obyden, S.K.New growth features of natural diamonds, revealed by colour cathodluminescence scanning electron microscope (CCL SEM) techniqueScanning, Vol. 14, No. 1, Jan-Feb. pp. 3-10.# HC 517GlobalNatural diamond morphology, Cathodluminescence
DS1993-0792
1993
Kawarada, H., Yamaguch, A.Excitonic recomnbination radiation as characterization of diamonds usingcathodluminescenceDiamond Relat, Vol. 2, No. 2-4, March 31, pp. 100-105GlobalDiamond morphology, Cathodluminescence
DS1994-0651
1994
Graham, R.J., Buseck, P.R.Cathodluminescence of brown diamonds as observed by transmission electronmicroscopy.Phil. Magazine B., Vol. 70, No. 6, Dec. pp. 1177-1185.GlobalDiamond morphology, Cathodluminescence
DS1995-0311
1995
Chinn, I.L., Gurney, J.J., Milledge, H.J., Taylor, W.R.Cathodluminescence of CO2 bearing and CO2 free diamonds from the George Creek K1 kimberlite.Proceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 116-17.Colorado, WyomingCathodluminescence, Deposit -George Creek
DS1995-0574
1995
Gaft, M., Kagan, B., Shoval, S.Laseroluminescent sorting and identification of diamondsProceedings of the Sixth International Kimberlite Conference Extended Abstracts, p. 172-74.Russia, SiberiaDiamond morphology, Diamond luminescence
DS1995-1251
1995
Milledge, H.J., Bulanova, G.P., Taylor, W.R., Woods, P.A.Internal morphology of Yakutian diamonds - a cathodluminescence And infrared mapping study.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 384-386.Russia, YakutiaDiamond morphology, Cathodluminescence
DS1995-1886
1995
Taylor, W.R., Gurney, J.J., Milledge, H.J.Nitrogen aggregation and cathodluminescence characteristics of Diamonds from Point Lake.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 614-616.Northwest TerritoriesCathodluminescence, Deposit -Point Lake
DS1995-1887
1995
Taylor, W.R., Kiviets, G., Gurney, J.J., Milledge, WoodsGrowth history of an eclogitic diamond from the Kaal Vallei kimberlite, an infrared cathodluminescence CIProceedings of the Sixth International Kimberlite Conference Abstracts, pp. 617-619.South AfricaCathodluminescence, Carbon isotope, Deposit - Kaal Vallei
DS1995-1966
1995
Van Heerden, L.A., Taylor, W.R., Kirkley, Gurney, BulanovaComparison of physical spectroscopic and stable isotope characteristics of Roberts Victor diamonds.Proceedings of the Sixth International Kimberlite Conference Abstracts, pp. 231-232.South AfricaCathodluminescence, Deposit -Roberts Victor
DS1996-1409
1996
Taylor, W.R.Overview of diamond growth histories - implications for understanding lithospheric processes, tectonic settingsAustralia Nat. University of Diamond Workshop July 29, 30., 2p.GlobalDiamond morphology, Diamond structure, growth, CL, cathodluminescence
DS1997-0379
1997
Gems & GemologyCathodluminescence of yellow diamondsGems and Gemology, Vol. 33, winter, pp. 298.GlobalDiamond - colour, Cathodluminescence
DS1997-0821
1997
Moses, T.M., Reinita, I.M., Johnson, M.L., King, J.M.A contribution to understanding the effect of blue fluorescence on the appearance of diamonds.Gems and Gemology, Vol. 33, winter, pp. 244-259.GlobalDiamond fluoresence, Review
DS1998-0917
1998
Magee, C.W., Taylor, W.R.Constraints on the history and origin of carbonado from luminescencestudies.7th International Kimberlite Conference Abstract, pp. 527-8.Brazil, Central African RepublicCarbonado, Cathodluninescence, Photoluminescence
DS2000-0903
2000
Smith, C.P., Bosshart, G., Pnahlo, Hammer, KlapperGE POL diamonds: before and after. Type 11a and HPHT annealing .Gems and Gemology., Vol. 36, Fall, pp. 192-215.GlobalDiamond - enhancement, colour change, Cathodluminescence, photoluminescence
DS2000-0903
2000
Smith, C.P., Bosshart, G., Pnahlo, Hammer, KlapperGE POL diamonds: before and after. Type 11a and HPHT annealing .Gems and Gemology., Vol. 36, Fall, pp. 192-215.GlobalDiamond - enhancement, colour change, Cathodluminescence, photoluminescence
DS2000-0949
2000
Taylor, L.A., Keller, R.A., Snyder, G.A., Wang, W., et al.Diamonds and their mineral inclusions and that they tell us: detailed pullapart a Diamondiferous eclogiteInternational Geology Review, Vol. 42, No. 11, Nov. pp. 959-83.Russia, YakutiaDiamond - morphology, eclogite, Mineral chemistry, cathodluminescence
DS2001-0239
2001
De, S., Heaney, P.J., Wang, J.Chemical heterogeneity in carbonado, an enigmatic polycrystalline diamondEarth and Plan. Sci. Letters, Vol. 185, No. 3-4, Feb. 28, pp. 315-30.Central African RepublicGeochemistry - carbonado, Cathodluminescence
DS2001-1072
2001
Shumilova, T.G., Mikhalitsyn, Bukalov, LeitesInvestigation of the ordering of skeletal diamonds from the Kumdykol deposit by Raman spectroscopy and lumin.Doklady Academy of Sciences, Vol. 378, No. 4, May-June pp. 390-3.RussiaDiamond - morphology, Luminesence
DS2001-1288
2001
Zaitsev, A.M.Optical properties of diamond. A dat a HandbookSpringer Verlag, ISBN 3-540-66582-x, 480p.GlobalRefraction, reflection, absorption, scattering, color, Classification - physical, luminescence
DS2003-0452
2003
Gems & GemologySome unusual type II diamondsGems & Gemology, Vol. 39,3, Fall, p. 214-5.GlobalLuminescent features
DS200412-0642
2003
Gems & GemologySome unusual type II diamonds.Gems & Gemology, Vol. 39,3, Fall, p. 214-5.TechnologyLuminescent features
DS200412-2181
2004
Yelisseyev, A.P., Pokhilenko, N.P., Steeds, J.W., Zedgenizov, D.A., Afanasiev, V.P.Features of coated diamonds from the Snap Lake/King Lake kimberlite dyke, Slave Craton, Canada, as revealed by optical topographLithos, Vol. 77, 1-4, Sept. pp. 83-97.Canada, Northwest TerritoriesCoated diamonds, absorption, luminescence, nickel, nitr
DS200512-0565
2005
Kopylova, M.G., Lefebvre, N.S., De Stefano, A., Kivi, K.Archean lamprophyric rocks of Wawa: diamonds in a convergent margin.GAC Annual Meeting Halifax May 15-19, Abstract 1p.Canada, Ontario, WawaAlkaline rocks, subduction, breccia, cathodluminescence
DS200512-0641
2005
Lindblom, J., Holsa, J., Papunen, H., Hakkanen, H.Luminescence study of defects in synthetic as grown and HPHT diamonds compared to natural diamonds.American Mineralogist, Vol. 90, Feb-Mar. pp. 428-440.Cathodluminescence
DS200912-0156
2009
Davies, G., Liaugaudas, G., Collins, A.T., Suhling, K.Luminescence life time mapping in diamond.Journal of Physics Condensed Matter, in press ( August)TechnologyDiamond - luminescence
DS200912-0262
2008
Gotz, J., Kempe, U.A comparison of optical microscope and scanning electron microscope based cathodluminesence (CL) imaging and spectroscopy applied to geosciences.Mineralogical Magazine, Vol. 72, 4, pp. 909-924.TechnologyCathodluminescence
DM200912-2237
2009
The Israeli Diamond IndustryDiamond fluorescence to influence GIA's diamond grading.israelidiamond.co.il, July 8, 1/4p.TechnologyNews item - Fluorescence
DM201012-2234
2010
The Israeli Diamond IndustryThe unwarranted importance attributed to fluorescent emission.israelidiamond.co.il, July 5, 5p.TechnologyFluoresence
DS201112-0121
2011
Bruce, L.F., Kopylova, M.G., Longo, M., Ryder, J., Dobrzhinetskaya, L.F.Luminescence of diamonds from metamorphic rocks.American Mineralogist, Vol. 96, 1, pp. 14-22.Canada, Ontario, Wawa, Russia, GermanyUHP, cathodluminescence
DS201112-0821
2009
Pratesi, G.Impact diamonds: formation, mineralogical features and cathodluminescence properties.In: Cathodluminescence and its application in the planetary sciences, pp. 61-86.TechnologyCathodluminescence
DS201412-0219
2014
Edwards, P., Lee, M.Cathodluminescence hyper spectral imaging in geoscience.GAC/MAC short Course, MayTechnologyCathodluminescence
DS201412-0550
2014
Mariano, A.N., Mariano, A.Jr.Cathodluminescence as a tool in exploration geology.GAC/MAC short Course, MayTechnologyCathodluminescence
DS201412-0590
2014
Mitchell, R.H.Cathodluminescence of apatite.GAC/MAC short Course, May, pages unknownTechnologyCathodluminescence
DS201412-0740
2014
Robertson, M.Cathodluminescence instrumentation.GAC/MAC short Course, MayTechnologyCathodluminescence
DS201412-1007
2014
Yelisseyev, A., Khrenov, A., Afanasiev, V., Pustavarov, V., Gromilov, S., Panchenko, A., Poikilenko, N., Litasov, K.Luminesence of impact diamonds from the Popigai astrobleme.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, 2p. AbstractRussia, SiberiaDiamond luminescence
DS201507-0328
2015
Mironov, V.P., Rakevich, A.L., Stepanov, F.A., Emelyanova, A.S., Zedgenizov, D.A., Shatsky, V.S., Kagi, H., Martynovich, E.F.Luminescence in diamonds of the Sao Luiz placer ( Brazil).Russian Geology and Geophysics, Vol. 56, pp. 729-736.South America, BrazilDiamond luminesence
DS201508-0352
2015
Eaton-Magana, S.Comparison of luminescence life times from natural and laboratory irradiated diamonds.Diamond and Related Materials, Vol 58, pp. 94-102.TechnologyDiamond - luminescence
DS201511-1870
2015
Renfro, N.The application of differential interference contrast microscopy to gemmology.Journal of Gemmology, Vol. 34, 7, pp. 616-622.TechnologyLuminescence
DS201511-1877
2015
Sastry, M.D., Mane, S., Gaonkar, M., Bhide, M.K., Desai, S.N., Ramachandran, K.T.Luminescence studies of gemstones and diamonds.International Journal of Luminescence and Applications, Vol. 5, 3, pp. 293-297.TechnologyLuminescence

Abstract: Some of the minerals like Corundum, chryso beryl, beryllium alumino silicate (emerald) and also Diamond exhibit exceptional optical properties[1] and in some cases attractive colours; in India these were recognized quite early since the days of Indus valley civilization. In more recent times there has been a lot of scientific interest in colours and colour modifications in Gem minerals and in Diamonds. Science of gem stones deals with their identification by non destructive means and understanding of origin of colour and excellent optical properties[1]. Optical methods have long been used to obtain properties like ‘Refractive Index’ which still remains an important parameter as a preliminary test to identify the gemstone/mineral. The spectroscopic studies of gem grade minerals are essentially directed towards some of these features in identifying and understanding the spectral properties of chromophores, either chemical impurities and/or radiation induced point defects, in solids. In this context a variety of spectroscopic methods are used to address the problems of the Gem stone identification and identification of origin of colours and colour modification treatments. The methods frequently used in Gem testing labs are the following: (i)Electronic absorption in UV-Visible-NIR range.(ii)UV-Vis excited luminescence, (iii) Vibrational spectra – Absorption in the Infra red range (iv) Vibrational spectra using Light Scattering (Raman spectroscopy) (v)Surface Fluorescence mapping Under deep UV excitation. The present paper deals with the luminescence studies in rubies, sapphires, emeralds and diamonds. Special mention may be made of fluorescence mapping using deep UV excitation (around 205 nm) corresponding to the band gap of diamond. Under such an excitation inter band excitation takes place creating a e-h pair and most of the absorption and subsequent emission being restricted to the surface. This makes surface mapping possible and thereby elucidating the growth patterns. This is invaluable in the diagnostics for the detection of synthetic diamonds. In this introductory presentation on the Luminescence methods in Gemmology, we give a brief account of optical spectroscopic methods which mainly deal with identification of corundum based gem stones (rubies, sapphire) and diamonds including the electronic absorption and luminescence of chromophore centres. In gem testing infrared absorption and Raman scattering methods are main work horses and they will be brought in as and when necessary to give a complete picture.
DS201608-1393
2016
Breeding, C.M.The art and science of diamond fluorescence: what it tells us about the growth history of natural and synthetic gem diamonds.GSA Annual Meeting, Abstract, 1p.TechnologyFluorescence

Abstract: Gem diamonds are highly valued for their color, or the absence of it. However, the myriad of colors and patterns that are revealed when a diamond is exposed to ultraviolet light are often more impressive than the stones themselves. High energy (i.e., ultra-shortwave <230 nm) UV light from the DiamondView instrument excites fluorescence from natural and synthetic diamonds that not only provides a tremendous amount of information about defect incorporation during growth, but also stunningly artistic designs. Fluorescence patterns reveal details about the original morphology of a diamond even after all of the natural surfaces are removed. In addition, concentrations of luminescent centers along structurally controlled planes in a natural diamond lattice provide information about the original distribution of impurities and other defects and the thermal and deformational history of diamonds as they spend millions (or billions) of years in the Earth’s mantle and then are rapidly erupted in a kimberlite magma. Likewise, the distribution of nitrogen, boron, and nickel-related luminescence in synthetic diamonds give clues to the temperature, pressure, and catalytic conditions under which they were grown in a laboratory. Evaluation of the fluorescence patterns from diamonds helps the scientist better understand the incorporation and migration of atomic level defects in the diamond structure while allowing the artist to appreciate some of the most unusual and amazing patterns that nature produces.
DS201608-1434
2016
Post, J.E., Gaillou, E., Butler, J.E., Byrne, K.S.Investigations into luminescence properties and compositions of colored diamonds.GSA Annual Meeting, Abstract, 1p.TechnologyLuminescence

Abstract: The Smithsonian’s National Gem Collection includes the Hope Diamond and an assortment of other significant fancy-colored diamonds, providing a unique opportunity to conduct detailed and sustained studies on an unprecedented selection of these rare and valuable stones. We present an overview and recent results from our work on pink, blue and chameleon diamonds. Boron causes the blue color of the Hope Diamond and other type IIb diamonds, but scarcity, high value, and the low concentration of B has inhibited B analyses of natural IIb diamonds. We used FTIR and ToF-SIMS to measure concentrations and distributions of B in the Hope and other blue diamonds. ToF-SIMS analyses gave spot B concentrations as high as 8.4 ± 1.1 ppm for the Hope Diamond to less than 0.08 ppm in other blue diamonds and revealed strong zoning of B in some diamonds, which was confirmed by mapping using synchrotron FTIR. Boron is also responsible for the phosphorescence emissions of IIb diamonds, at 660 nm and 500 nm; the emissions are likely caused by donor-acceptor pair recombination processes involving B and other defects. Approximately 50 type I natural pink diamonds were compared using UV-Vis, FTIR, and CL spectroscopies. All stones exhibit pink color zoning, ~1µm thick [111] lamellae, in otherwise colorless diamond. The pink diamonds fall into two groups: 1) those from Argyle in Australia and Santa Elena in Venezuela, and 2) those from other localities. TEM imaging from FIB sections revealed that twinning is the likely mechanism by which plastic deformation is accommodated for the pink diamonds. The deformation creates new centers, including the one responsible for the pink color, which remains unidentified. The differences in the plastic deformation features for the two groups might correlate to the particular geologic conditions under which the diamonds formed. Fluorescence and thermoluminescence experiments on natural chameleon diamonds reveal that an emission band, peaking near 556nm, may be stimulated via a number of different mechanisms. We discuss the implications of our observations for the electronic structure of the 556nm-fluorescing defect center, and the connections to the unidentified color center responsible for chameleon color changes.
DS201610-1841
2016
Ardon, T., Eaton-Magana, S.High temperature annealing of hydrogen-rich diamonds.GSA Annual Meeting, 1/2p. AbstractAfrica, ZimbabwePhotoluminescence

Abstract: This study gives an analysis of the effect of high temperature annealing on the infrared and photoluminescence (PL) features as well as the inclusions of two hydrogen-rich diamond plates from Zimbabwe that were cut from the same rough. The samples showed strong inclusion-related zoning known as hydrogen clouds which consist of micron-sized particles of as yet undetermined structure. This allowed hydrogen-rich and hydrogen-poor areas to be compared throughout the annealing study. The diamond plates were annealed to temperatures of 300oC, 600oC, 800oC, 1000oC, 1400oC, and 1700oC. The infrared and PL, and Raman maps were collected after every temperature step to study the effects of heat on the defects, and photomicrographs were collected to study the inclusions. Several photoluminescence features were seen to decrease in size including the 637 nm peak, which is the negatively charged nitrogen-vacancy center [NV-] and the 503.2 nm peak, known as the H3 and consists of two nitrogen atoms and vacancy in the neutral charge state and normally has a high thermal stability. The H2 defect at 986.2 nm, which is the negative form of the H3, was shown to increase after annealing. The hydrogen clouds underwent dramatic changes in apparent color and particle size, going from a light translucent gray appearance to an opaque black. The particle size grew from less than one micron to an average of fourteen microns, and the hexagonal outline of the particles became noticeable. Spatial raman spectroscopy was used to show that the color change and size change were due to graphitization of the included particles.
DS201708-1620
2017
Davies, G.Genesis of diamond inclusions: an integrated cathodluminescence ( Cl) and electron backscatter diffraction ( EBSD) study on eclogitic and peridotitic inclusions and their diamond host.11th. International Kimberlite Conference, PosterTechnologyluminescence

Abstract: Diamond inclusions are potentially fundamental to understanding the formation conditions of diamond and the volatile cycles in the deep mantle. In order to fully understand the implications of the compositional information recorded by inclusions it is vital to know whether the inclusions are proto-, syn-, or epigenetic and the extent to which they have equilibrated with diamond forming fluids. In previous studies, the widespread assumption was made that the majority of diamond inclusions are syngenetic, based upon observation of cubo-octahedral morphology imposed on the inclusions. Recent work has reported the crystallographic relationship between inclusions and the host diamond to be highly complex and the lack of crystallographic relationships between inclusions and diamonds has led some to question the significance of imposed cubo-octahedral morphology. This study presents an integrated EBSD and CL study of 9 diamonds containing 20 pyropes, 2 diopsides, 1 forsterite and 1 rutile from the Jwaneng and Letlhakane kimberlite clusters, Botswana. A new method was developed to analyze the crystallographic orientation of the host diamond and the inclusions with EBSD. Diamonds plates were sequentially polished to expose inclusions at different levels in the diamond. CL imaging at different depths was performed in order to produce a 3D view of diamond growth zones around the inclusions. Standard diamond polishing techniques proved too aggressive for silicate inclusions as they were damaged to such a degree that EBSD measurements on the inclusions were impossible. The inclusions were milled with a Ga+ focused ion beam (FIB) at a 12° angle to clean the surface for EBSD measurements. Of the 24 inclusions, 9 have an imposed cubo-octahedral morphology. Of these inclusions, 6 have faces orientated parallel to diamond growth zones and/or appear to have nucleated on a diamond growth surface, implying syngenesis. In contrast, other diamonds record resorption events such that inclusions now cut diamond growth zones. In most cases, the growth zonation around inclusions is not well defined due to CL haloes but some inclusions clearly disrupt diamond growth. Crystallographic orientations of diamond and the inclusions, determined using EBSD, revealed that each inclusion has a homogeneous orientation and record no compositional zonation. The diamonds also showed no angular deviations despite many having multiple growth and resorption zones; implying epitaxial growth of diamond. Crystallographic alignment between diamond and inclusions was not recorded for the principle planes and limited to 3 possible coincidences on minor planes from the 24 inclusions studied. The CL data show no evidence of syngenesis for these 3 inclusions. Analyses of two diamonds with inclusion clusters in different growth zones, 400 µm apart, revealed the same chemical composition and orientation, potentially implying they originated from an original larger inclusion. Combined EBSD and CL data suggest that there is no direct orientational correlation (epitaxial growth) between silicate inclusions and the host diamond, even when the mineral phases are of the same symmetry group. The presentation will provide a detailed evaluation of the genesis of individual inclusions.
DS201709-2023
2017
Loudin, L.C.Photoluminescence mapping of optical defects in HPHT synthetic diamond.Gems & Gemology, Vol. 53, 2, summer, pp. 168-179.Technologyluminesence

Abstract: Photoluminescence (PL) mapping provides a means to identify the distribution of optical centers in diamond. To demonstrate the impact of this method on the field of gemology and the study of diamonds, photoluminescence maps were acquired from a laboratory-irradiated brownish orange HPHT synthetic diamond of mixed diamond type. Acquisition time for each PL map was less than four minutes. Analysis of the maps confirmed that optical centers are incorporated in diamond growth sectors, such as {111} octahedral, {100} cubic, {110} dodecahedral, and {113} trapezohedral. The remarkable correlation between optical defects and growth sectors in the sample demonstrates that high-speed photoluminescence mapping is ideal for rapidly determining the distribution of optical defects resulting from both diamond growth and treatments. We anticipate that this technique will allow gemological labs to continue to identify increasingly sophisticated synthetic diamonds and color treatments, helping to ensure consumer confidence in the diamond industry.
DM201711-2561
2017
Deljanin, B.Diamond fluorescence: its effect on the diamond pricing and the use of fluorescence for diamond identification.Vancouver Kimberlite Cluster, Nov. 7, 1p. AbstractTechnologyNews item - fluorescence
DS201802-0223
2018
Boldyrev, K.N., Mavrin, B.N., Sherin, P.S., Popova, M.N.Bright luminescence of diamonds with GeV centers.Journal of Luminescence, Vol. 193, pp. 119-124.Technologyluminescence

Abstract: We report on the quantum yield (?) and decay time (?) measurements at room temperature for the bright red-orange (602 nm) luminescence from new germanium-vacancy (Ge-V) centers in nano- and microcrystalline diamonds synthesized at high pressure and high temperature. The values ? = 3 ± 1% and ? = 6.2±0.2 ns were found. The Stokes shift measured as the energy difference between the maxima of the luminescence and luminescence excitation spectra is negligible. The relative intensity of the zero-phonon line constitutes up to 70% from the total intensity of the luminescence. Results of our ab initio DFT calculations for the ground-state electronic and vibrational structure of (Ge-V)? in diamond are presented and discussed.
DS201802-0224
2018
Byrne, K.S., Butler, J.E., Wang, W., Post, J.E.Chameleon diamonds: thermal processes governing luminescence and model for the color change.Diamond & Related Materials, Vol. 81, pp. 45-53.Technologyluminescence

Abstract: To date, the eponymous color-changing behavior of chameleon diamonds lacks an explanation in terms of an identified diamond defect structure or process. Well known, however, is that this color-change is driven by the influence of both light and heat. In this paper, we present observations of how luminescence emission in chameleon diamonds responds to temperature changes and optical pumping. Fluorescence, phosphorescence, and thermoluminescence experiments on a suite of natural chameleon diamonds reveal that a specific emission band, peaking near 550 nm, may be stimulated by several different mechanisms. We have observed thermal quenching of the 550 nm emission band with an activation energy of 0.135 eV. The 550 nm band is also observed in phosphorescence and thermoluminescence. Thermoluminescence spectra suggest the presence of low lying acceptor states at 0.7 eV above the valence band. When excited with 270 nm light, we observe emission of light in two broad spectral bands peaking at 500 and 550 nm. We suggest that the 550 nm emission band results from donor—acceptor pair recombination (DAPR) from low lying acceptor states at ca. 0.7 eV above the valence band and donor states approximately 2.5 to 2.7 eV above the valence band. We do not identify the structure of these defects. We propose a speculative model of the physics of the color change from ‘yellow’ to ‘green’ which results from increased broad-band optical absorption in the near-IR to visible due to transitions from the valence band into un-ionized acceptor states available in the ‘green’ state of the chameleon diamond. We report near-IR absorption spectra confirming the increased absorption of light in the near-IR to visible in the ‘green’ when compared to the ‘yellow’ state with a threshold at ca. 0.65 eV, supporting the proposed model.
DS201803-0482
2018
Tatsumi, N., Harano, K., Ito, T., Sumiya, H.The luminescence emitted from the type Ib and IIa diamonds under SiO2 polishing process.Diamond & Related Materials, Vol. 83, pp. 104-108.Technologyluminescence

Abstract: The luminescence of triboplasma during diamond polishing was investigated. The main luminescence in the ultraviolet range came from N2 molecules in the air. The colors of the visible range of triboplasma were the same as those observed in the photoluminescence images, excited by the ultraviolet light. The color of the triboplasma luminescence was green for type Ib diamond, which was mainly from the H3 center. The blue luminescence for type IIa diamond was mainly from Band A. The correlation between the diamond temperature and periphery speed indicate that that the mechanical abrasion component also increased linearly. However the polishing rate showed a threshold at the periphery speed of 26?km/h which corresponds well with the threshold of the triboplasma generation. These results imply that the electrical and optical energy of the triboplasma excited the defect level at the diamond surface and enhanced the chemical polishing rate of the diamond.
DS201804-0715
2018
Lemiere, B.A review of pXRF ( field portable X-ray fluoresence) applications for applied geochemisty.Journal of Geochemical Exploration, Vol. 188, pp. 350-362.Technologyflourescence
DS201804-0747
2017
Tang, S., Song, Z., Lu, T., Su, J., Ma, Y.Two natural type IIa diamonds with strong phosphorescence and Ni related defects.Gems & Gemology Lab Notes, Vol. 53, 4, pp. 476-478.Technologyfluoresecence

Abstract: Strong phosphorescence under UV excitation is rarely seen in natural diamond and normally limited to hydrogen-rich type Ia or type IaA/Ib chameleons and type IIb diamonds (T. Hainschwang et al., "A gemological study of a collection of chameleon diamonds," Spring 2005 G&G, pp. 20-35; S. Eaton-Magaña and R. Lu, "Phosphorescence in type IIb diamonds," Diamond and Related Materials, Vol. 20, No. 7, 2011, pp. 983-989). When seen in other diamond types, an even rarer occurrence, it is shorter and less intense. Recently, the National Gemstone Testing Center (NGTC) in Beijing encountered two natural diamonds that showed extraordinarily strong blue phosphorescence and uncommon fluorescence colors under the DiamondView.
DS201808-1746
2018
Gems & JewelleryFocus: Looking for the light. Fluorescence in gemstones.Gems & Jewellery, Vol. 27, 2, pp. 12-14.Technologyfluorescence
DS201901-0002
2018
Anthonis, A., Chapman, J., Smans, S., Bouman, M., De Corte, K.Fluorescence in diamond: new insights.Gems & Gemology, Sixth International Gemological Symposium Vol. 54, 3, 1p. Abstract p. 265-6.GlobalFluoresence

Abstract: The effect of fluorescence on the appearance of diamonds has been a subject of debate for many years (Moses et al., 1997). In the trade, fluorescence is generally perceived as an undesirable characteristic. Nearly 80% of diamonds graded at HRD Antwerp receive a “nil” fluorescence grade, while the remainder are graded as “slight,” “medium,” and “strong,” their value decreasing with level of fluorescence. To understand how fluorescence might change diamond appearance, a selection of 160 round brilliant-cut diamonds were investigated in detail. This study focused on the effect of thetic samples, it is possible that some of the observed phosphorescence does not involve boron impurities. In this paper we report on the results of combined fluorescence, phosphorescence, thermoluminescence, and quantitative charge transfer investigations undertaken on both HPHT and CVD synthetic diamond, with the objective of identifying which defects are involved in the fluorescence and phosphorescence processes.
DS201901-0047
2018
Milisenda, C.C.Gemstones and photoluminesence.Gems & Gemology, Sixth International Gemological Symposium Vol. 54, 3, Fall 1p. Abstract p. 258Africa, Namibia, South America, Brazilphotoluminescence

Abstract: Laser- and ultraviolet-excited luminescence spectroscopy and imaging are important techniques for gemstone testing, as they are among the most sensitive spectroscopic methods (see Hainschwang et al., 2013). They are able to identify optically active crystallographic defects such as vacancies and substitutions that are present in such small amounts that they cannot be detected by any other analytical method. Photoluminescence (PL) analysis became particularly important in the last decade for the separation of natural from synthetic diamonds and the detection of treatments. Today the availability of specially designed and reasonably priced portable equipment enables the rapid in situ identification of mounted and unmounted natural diamonds. Although PL spectroscopy is most commonly used for diamond identification, it can also be applied to colored stones. Some stones exhibit unique luminescence patterns, which can be used to identify the material. Other examples are the separation of natural from synthetic spinel and the detection of heat-treated spinel. Since chromium is a typical PL-causing trace element, it is also possible to separate chromium-colored gems such as ruby and jadeite from their artificially colored counterparts. The color authenticity of specific types of corals and pearls can also be determined. The rare earth elements (REE) are among the main substituting luminescence centers in Ca2+-bearing minerals (Gaft et al., 2005). Recently, REE photoluminescence has been observed in cuprian liddicoatite tourmalines from Mozambique (Milisenda and Müller, 2017). When excited by a 785 nm laser, the stones showed a series of bands at 861, 869, 878, 894, and 1053 nm, consistent with the PL spectra of other calcium-rich minerals (Chen and Stimets, 2014). LA-ICP-MS analysis confirmed the REE enrichment in this type of tourmaline compared to cuprian elbaites from Brazil and Nigeria. As a result, photoluminescence can be used as a further criterion for origin determination of Paraíba-type tourmalines. We have extended our research on other calcium-rich gems, including various grossular garnet varieties such as hessonite and tsavorite (figure 1), uvarovite garnet, apatite, titanite, and scheelite, as well as a number of high-refractive-index glasses and colorchange glasses, respectively.
DS201901-0095
2018
Zhao, J., Breeze, B.G., Green, B.L., Diggle, P.L., Newton, M.E.Fluorescence, phosphoresence, thermoluminesence, and charge tranfer in synthetic diamond.Gems & Gemology, Sixth International Gemological Symposium Vol. 54, 3, 1p. Abstract p. 266.GlobalFluoresence

Abstract: Photoluminescence (PL) and phosphorescence underpin many of the discrimination techniques used to separate natural from synthetic diamond. PL is at the heart of many new quantum technologies based on color centers in lab-grown diamonds. In HPHT synthetic diamond, the phosphorescence observed is explained in terms of donor-acceptor pair recombination. The thermal activation of electrons to neutral boron acceptors shows that boron plays a key role in the phosphorescence process. However, there are a number of things we struggle to explain. For example, the phosphorescence peak positions are not fully explained, and there is no conclusive link between the emission and charge transfer involving the substitutional nitrogen donor. Secondly, the origin of the phosphorescence observed in some synthetic diamond samples grown by the CVD process is unclear. Although we now have evidence for unintentional boron impurity incorporation at stop-start growth boundaries in some CVD syn- thetic samples, it is possible that some of the observed phosphorescence does not involve boron impurities. In this paper we report on the results of combined fluorescence, phosphorescence, thermoluminescence, and quantitative charge transfer investigations undertaken on both HPHT and CVD synthetic diamond, with the objective of identifying which defects are involved in the fluorescence and phosphorescence processes.
DS201904-0720
2019
Bouman, M., Anthonis, A., Chapman, J., Smans, S., De Corte, K.The effect of blue fluorescence on the colour appearance of round brilliant cut diamonds.Journal of Gemology, Vol. 36, 4, pp. 298-315.Globaldiamond fluoresence
DM201905-1126
2019
Diamonds.netDismantling the fluorescence stigma. diamonds.net, Apr. 10, 2p.GlobalNews item - fluorescence
DS201905-1027
2019
Ekimov, E.A., Kondrin, M.V., Krivobok, V.S., Khomich, A.A., Vlasov, I.I., Khmelnitskiy, R.A.Effect of Si, Ge and Sn dopant elements on structure and photoluminescence of nano- and microdiamonds synthesized from organic compounds.Diamond & Related Materials, Vol. 93, pp. 75-83.Globalluminescence

Abstract: HPHT synthesis of diamonds from hydrocarbons attracts great attention due to the opportunity to obtain luminescent nano- and microcrystals of high structure perfection. Systematic investigation of diamond synthesized from the mixture of hetero-hydrocarbons containing dopant elements Si or Ge (C24H20Si and C24H20Ge) with a pure hydrocarbon - adamantane (C10H16) at 8?GPa was performed. The photoluminescence of SiV? and GeV? centers in produced diamonds was found to be saturated when Si and Ge contents in precursors exceed some threshold values. The presence of SiC or Ge as second phases in diamond samples with saturated luminescence indicates that ultimate concentrations of the dopants were reached in diamond. It is shown that SiC inclusions can be captured by growing crystals and be a source of local stresses up to 2?GPa in diamond matrix. No formation of Ge-related inclusions in diamonds was detected, which makes Ge more promising as a dopant in the synthesis method. Surprisingly, the synthesis of diamonds from the C24H20Sn hetero-hydrocarbon was ineffective for SnV? formation: only fluorescence of N-and Si-related color centers was detected at room temperature. As an example of great potential for the synthesis method, mass synthesis of 50-nm diamonds with GeV? centers was realized at 9.4?GPa. Single GeV? production in individual nanodiamond was demonstrated.
DS201905-1083
2019
Vanpoucke, D.E.P., Nicley, S.S., Raymakers, J., Maes, W., Haenen, K.Can europium atoms form luminescent centres in diamond: a combined theoretical-experimental study.Diamond & Related Materials, Vol. 94, pp. 233-241.Globalluminescence

Abstract: The incorporation of Eu into the diamond lattice is investigated in a combined theoretical-experimental study. The large size of the Eu ion induces a strain on the host lattice, which is minimal for the Eu-vacancy complex. The oxidation state of Eu is calculated to be 3+ for all defect models considered. In contrast, the total charge of the defect-complexes is shown to be negative: ?1.5 to ?2.3 electron. Hybrid-functional electronic-band-structures show the luminescence of the Eu defect to be strongly dependent on the local defect geometry. The 4-coordinated Eu substitutional dopant is the most promising candidate to present the typical Eu3+ luminescence, while the 6-coordinated Eu-vacancy complex is expected not to present any luminescent behaviour. Preliminary experimental results on the treatment of diamond films with Eu-containing precursor indicate the possible incorporation of Eu into diamond films treated by drop-casting. Changes in the PL spectrum, with the main luminescent peak shifting from approximately 614?nm to 611?nm after the growth plasma exposure, and the appearance of a shoulder peak at 625?nm indicate the potential incorporation. Drop-casting treatment with an electronegative polymer material was shown not to be necessary to observe the Eu signature following the plasma exposure, and increased the background luminescence.
DS201906-1283
2018
Chanturia, V.A., Dvoichenkova, G.P., Morozov, V.V., Kovalchuk, O.E., Podkamenny, Y.A., Yakolev, V.N.Experimental justification of luminophore composition for indication of diamonds in x-ray luminescence separation of kimberlite ore.Journal of Mineral Science, Vol. 54, 3, pp. 458-465.Russialuminescence

Abstract: Organic and inorganic luminophores of similar luminescence parameters as diamonds are selected. Indicators, based on the selected luminophores, are synthesized. Spectral and kinetic characteristics of luminophores are experimentally determined for making a decision on optimal compositions to ensure maximum extraction of diamonds in X-ray luminescence separation owing to extra recovery of non-luminescent diamond crystals. As the components of luminophore-bearing indicators, anthracene and K-35 luminophores are selected as their parameters conform luminescence parameters of diamonds detected using X-ray luminescence separator with standard settings.
DS201906-1303
2019
Horsburgh, N.J., Finch, A.A.Smart sorting of minerals. Spectroscopy3rd International Critical Metals Meeting held Edinburgh, 1p.abstract p. 41.Globalluminescence
DS201906-1320
2019
Matindi, T.B., Naidoo, S.R., Ntwaeaborwa, O.M.Luminesence induced by N-O ion implantation into diamond.Diamond & Related Materials, Vol. 96, pp. 11-19.Globalphotoluminescence

Abstract: The incorporation of shallow n-type dopants in diamond is one of the major challenges for its electronic applications. n-Type behaviour in diamond has been observed for substitutional phosphorus and nitrogen, with activation energies of approximately 0.62 and 1.7?eV, respectively. Both nitrogen and phosphorus are deep lying substitutional impurity states in diamond. It has been theoretically found that the substitution of the NO molecule into the diamond lattice forms a stable defect in the band gap and, in the negatively charged state induces a shallow defect below the conduction band edge which may lead to n-type conductivity. In this study, low-temperature photoluminescence measurements using different excitation wavelengths were used to investigate the nature and behaviour of the defects induced by the implantation of NO ions into type IIa Chemical Vapor Deposition (CVD) diamond samples. Luminescence peaks were observed at 293.3, 297.3, 305.9, 309.8, 314.4 and 556.7?nm on the sample which was implanted by NO ions and annealed at 600?°C. The origin of these peaks is discussed and the mechanism of electronic transitions leading to emission of photoluminescence from these samples is proposed.
DM201911-2615
2019
Diamonds.netIndian traders rejecting fluorescent stones as 'defective'.diamonds.net, Oct. 24, 1/4p.IndiaNews item - fluorecence
DS201911-2571
2019
Vennari, C.E., Williams, Q.High pressure Raman and Nd3+ luminescence spectroscopy of bastnasite -(REE) CO3f.American Mineralogist, Vol. 104, pp. 1389-1401.Mantleluminescence

Abstract: Bastnäsite-(Ce), a rare earth element (REE) bearing carbonate (Ce,La,Y,Nd,Pr)CO3F, is one of the most common REE-bearing minerals and has importance from both economic and geologic perspectives due to its large REE concentration. It also provides an example of the structural interplay between carbonate groups and fluorine ions, as well as the complex bonding properties of rare earth elements. We report Raman vibrational and Nd3+ luminescence (4F3/2?4I9/2, 4F3/2?4I11/2, and 4F5/2+2H9/2?4I9/2) spectra of natural bastnäsite-(Ce) to 50 GPa at 300 K. Two phase transitions are observed under compression. Bastnäsite-I remains the stable phase up to 25 GPa, where it undergoes a subtle phase transition to bastnäsite-II. This is likely produced by a change in symmetry of the carbonate ion. Bastnäsite-II transforms to bastnäsite-III at ~38 GPa, as demonstrated by changes in the luminescence spectra. This second transition is particularly evident within the 4F3/2?4I9/2 luminescent transitions, and it appears that a new rare earth element site is generated at this phase change. This transition is also accompanied by modest changes in both the Raman spectra and two sets of luminescent transitions. Despite these transformations, the carbonate unit remains a stable, threefold-coordinated unit throughout this pressure range, with a possible increase in its distortion. Correspondingly, the rare-earth element site(s) appears to persist in quasi-ninefold coordination as well, implying that the general bonding configuration in bastnäsite is at least metastable over a ~30% compression range. All pressure-induced transitions are reversible, with some hysteresis, reverting to its ambient pressure phase on decompression.
DM201912-2886
2019
Diamonds.netThe curious case of fluorescence.diamonds.net, Nov. 26, 1/4p.GlobalNews item - fluorescence
DS202004-0530
2020
Post, J.E., Feather, R., Butler, J.E.Kimberley diamond acquired by the Smithsonian Institution and its flourescence and phosphorescence characteristics revealed. 55.08 ctJournal of Gemmology, Vol. 37, 1, pp. 14, 15.Africa, South Africa, United Statesflourescence
DS202004-0550
2019
Zienko, S.I., Slabkovskii, D.S.A comparative analysis of the luminescence spectra of diamonds.Optics and Spectroscopy, Vol. 127, 3, pp. 564-570. doi.org/10.3390/min100100018Globalluminescence

Abstract: To identify the signs that distinguish natural diamonds from artificial diamonds, a comparative analysis of the luminescence spectra with regards to the Q factor, center of gravity, bandwidth parameter, and energy losses in the diamond crystal lattice under conditions of ohmic and dielectric relaxation of luminescence is performed. The phenomenon of resonant luminescence in the femtosecond time range is detected in diamond. It is established that natural and artificial diamonds noticeably differ in the relaxation frequency and in the energy of resonant radiation.
DS202005-0720
2019
Bateman , M.The Handbook of Luminescence Dating. ...dating techniques, including optically and infrared simulated luminescence and thermoluminescence applications.Whiitles Publishing Dunbeith Scotland ( Reviewed in Geoscience Canada Vol. 46, pp. 195-196., 416p. $ 163.00 GlobalLuminescence

Abstract: Luminescence dating is now widely applied by scientists working in Quaternary geology and archaeology to obtain ages for events as diverse as past earthquakes, desertification and cave occupation sites. Using quartz or feldspar minerals found in almost ubiquitous sand and finer sediments, luminescence can provide ages from over 500,000 years ago to modern. Written by some of the foremost experts in luminescence dating from around the world, this book takes a new approach. It explains what luminescence can and can’t do, what and where to sample, types of measurements available and how to interpret and analyse ages once they are measured. It is accordingly for scientists who require luminescence ages for their research rather than those scientists developing the luminescence technique or making their own luminescence measurements. The background to the technique is explained in simple terms so that the range of potential applications, limits and issues can be understood. The book helps scientists plan where and what to sample to optimise the successful application of luminescence and stemming from that the chronologies that can be constructed. The Handbook sets out the challenges and limitations when applying luminescence dating in different environmental and archaeological settings and gives practical advice on how issues might be avoided in sampling, or mitigated by requesting different laboratory measurement approaches or analysis. Guidance is provided on how luminescence ages can be interpreted and published as well as how they can be used within chronological frameworks. With luminescence dating continuing to develop, information on more experimental approaches is given which may help expand the range of chronological challenges to which luminescence dating can be routinely applied
DM202005-0837
2020
Rapaport MagazineAlrosa to reinvent fluorescence.Rapaport Magazine, No. 78, pp. 26-27.RussiaNews item - fluorescence
DS202006-0956
2020
Wang, K., Guo, R., Zhang, Y., Tian, Y.Photoluminescence and annealing of nitrogen-interstitials defects in electron irradiated diamond.Spectroscopy Letters, Vol. 53, 4, pp. 270-276.Globalluminescence

Abstract: There are a few studies reported in the literature describing the conversion of intrinsic defects but the involvement of nitrogen-interstitials in diamond has not been reported so far. In this paper, a detailed study on the conversion of nitrogen-interstitials in diamond during the irradiation and further annealing were presented by the micro-photoluminescence spectra. The results indicated that the interstitials were immobile until 300?°C and then escaped from the nitrogen capture, followed by migration and recombination with vacancies in the structure of nitrogen-vacancy and vacancy centers.
DS202007-1128
2020
Chanturia, V.A., Dvoichenkova, G.P., Morozov, V.V., Kovalchuk, O.E., Pdkamennyi, Yu.A., Yakovlev, V.N.Selective attachment of luminophore bearing emulsion at diamonds - mechanism analysis and mode selection. X-rayJournal of Mining Science, Vol. 56, 1, pp. 96-103. pdfGloballuminescence

Abstract: The authors present an efficient modification method of X-ray fluorescence separation with mineral and organic luminophores used to adjust spectral and kinetic characteristics of anomalously luminescent diamonds. The mechanism of attachment of luminophores at diamonds and hydrophobic minerals is proved, including interaction between the organic component of emulsions and the hydrophobic surface of a treated object and the concentration of insoluble luminophore grains at the organic and water interface. Selective attachment of the luminophore-bearing organic phase of emulsion at the diamond surface is achieved owing to phosphatic dispersing agents. Tri-sodium phosphate and sodium hexametaphosphate added to emulsion reduce attachment of the luminophore-bearing organic phase at the surface of kimberlite minerals. It is shown that phosphate concentration of 1.0-1.5 g/l modifies and stabilizes spectral and kinematic parameters of kimberlite mineral on the level of initial values. This mode maintains the spectral and kinematic characteristics of anomalously luminescent diamonds at the wanted level to ensure extraction of diamonds to concentrate.
DS202008-1438
2019
Rezvukhina, O.V., Korsakov, A.V., Rezvukin, D.I., Zamyatin, D.A., Zelenovskiy, P.S., Greshnyakov, E.D., Shur, V.Y.A combined Raman spectroscopy, cathodoluminescence, and electron backscatter diffraction study of kyanite porphyroblasts from diamondiferous and diamond-free metamorphic rocks ( Kokchetav Massif).Journal of Raman Spectroscopy, 13p. PdfRussialuminescence

Abstract: A series of precise nondestructive analytical methods (Raman spectroscopy, cathodoluminescence, and EBSD—electron backscatter diffraction) has been employed to investigate the internal textures of kyanite porphyroblasts from diamondiferous and diamond?free ultrahigh?pressure metamorphic rocks (Kokchetav massif, Northern Kazakhstan). Such internal kyanite characteristics as twinning, radial fibrous pattern, and spotty zoning were identified by means of Raman and cathodoluminescence imaging, whereas an intergrowth of two kyanite crystals was distinguished only by Raman imaging. The EBSD analysis recorded an ~10-25° changing of orientations along the elongation in the investigated kyanite porphyroblasts. The absence of a radial fibrous pattern and a spotty zoning on the EBSD maps indicates that these textures are not related to variations in crystallographic orientation. The absence of clear zoning patterns (cores, mantles, and rims) on the Raman, cathodoluminescence, or EBSD maps of the kyanite porphyroblasts indicates the rapid single?stage formation of these porphyroblasts near the peak metamorphic conditions and the lack of recrystallization processes. The obtained results provide important implications for deciphering of mineral internal textures, showing that the data obtained by cathodoluminescence mapping can be clearly reproduced by Raman imaging, with the latter method occasionally being even more informative. This observation is of significant importance for the study of minerals that are unexposed on a thin section surface or Fe? and Ni?rich minerals that do not show luminescence emission. The combination of the Raman spectroscopic, cathodoluminescence, and EBSD techniques may provide better spatial resolution for distinguishing different domains and textural peculiarities of mineral than the selective application of individual approaches.
DS202008-1454
2020
Vasilev, E., Kriulina, G., Klepikov, I.Luminescence of natural diamond in the NIR range.Physics and Chemistry of Minerals, Vol. 47, 31 6p. PdfRussialuminesence

Abstract: Natural diamond remains the source of many interesting effects and finds that are difficult to reproduce or detect in synthetic crystals. Herein, we investigate the photoluminescence (PL) of more than 2000 natural diamonds in the range 800-1050 nm. PL spectra were registered with excitation at 405, 450, 488 (Ar+), and 787 nm. The investigation revealed several systems that were not previously described. Some new dislocation-related systems were discovered in the spectra of crystals with signs of plastic deformation. They are four sets of doublets 890/900.3 nm, 918/930 nm, 946.5/961.5 nm, and 981/994 nm; four lines at 946, 961.5, 986, and 1020 nm. In low-nitrogen diamonds, they are accompanied by a line at 921 nm. Unreported vibronic systems with zero-phonon lines at 799.5, 819.6, 869.5, and 930 nm were revealed. In most cases, the systems were accompanied with doublet 883/885 of the simplest Ni-related center. We assigned these systems to Ni-related centers of different complexity. The results expand opportunities to restore growth conditions and thermal history of diamond crystals. The detection of new shallow centers expands the prospects of diamond as an optic and semiconductor material for applications in the NIR range.
DS202009-1665
2020
Speich, L., Kohn, S.C.QUIDDIT - a software tool for automated processing of diamond IR spectra.Computers & Geosciences, doi: 10.1016/j.cageo. 2020.104558 available 30p. PdfGlobalQUIDDIT

Abstract: Goal: QUIDDIT (QUantification of Infrared-active Defects in Diamond and Inferred Temperatures) is a novel Python application for fast and automated processing of IR spectra of diamond. It was first developed for the work presented in previous studies (Kohn et al., 2016; Speich et al. 2017 and 2018) and has been used in our lab successfully. The goal of this project is to enhance the software and provide easy access to users in research and industry alike. Read the "Project Log" section for more information.
DS202012-2212
2019
Dupuy, D.C., Phillips, J.C.Selecting a diamond verification instrument based on the results of the Assure program: an initial analysis.Journal of Gemmology, Vol. 36, pp. 606-619.Globalluminescence

Abstract: Recently, the rapid growth in synthetic diamond production-particularly in melee sizes-and the salting of melee parcels with synthetics have generated a commensurate increase in the need for diamond verification instruments (DVIs). Ongoing independent third-party testing of these instruments is being done through the Assure Program. DVI performance is tested in a UL laboratory using carefully developed testing standards and sample sets (i.e. natural diamonds and as-grown and treated synthetics, as well as simulants as appropriate). The initial phase of testing was performed during latter 2018 and the first part of 2019, and as of July 2019 results for 16 widely available devices from 12 DVI manufacturers were published online in the Assure Directory (https://diamondproducers.com/assure/assure-directory). From these test results, the authors have evaluated several important parameters that will help users select the best instrument for their needs. Performance results from several additional DVIs are expected to be released in the near future, and further testing and publi-cation of the data will occur as new instruments are introduced and existing ones are updated.
DS202012-2223
2020
Jones, D.C., Kumar, S., Lanigan, P.M.P., McGuiness, C.D., Dale, M.W., Twichen, D.J., Fisher, D., Martineau, P.M., Neil, M.A., Dunsby, C., French, P.M.W.Multidemensional luminescence microscope for imaging defect colour centres in diamond.Methods and Applications in Flouresence, Vol. 8, 1, 01404 htpp:dx.doi.org/10.1088/2050-6120/ab4eacGloballuminescence

Abstract: We report a multidimensional luminescence microscope providing hyperspectral imaging and time-resolved (luminescence lifetime) imaging for the study of luminescent diamond defects. The instrument includes crossed-polariser white light transmission microscopy to reveal any birefringence that would indicate strain in the diamond lattice. We demonstrate the application of this new instrument to detect defects in natural and synthetic diamonds including N3, nitrogen and silicon vacancies. Hyperspectral imaging provides contrast that is not apparent in conventional intensity images and the luminescence lifetime provides further contrast.
DS202012-2231
2020
McGuinness, C.D., Wassell, A.M., Lanigan, P.M.P., Lynch, S.A.Seperation of natural from laboratory-grown diamond using time -gated luminescence imaging.Gems & Gemology, Vol. 56, 2, summer pp. 220-229. pdfGloballuminescence
DS202103-0423
2021
Zaitsev, A.M., Kazuchits, N.M., Moe, K.S., Butler, J.E., Korolik, O.V., Rusetsky, M.S., Kazuchits, V.Luminescence of brown CVD diamond: 468 nm luminescence center.Diamond & Related Materials, Vol. 113, 108255, 7p. PdfGloballuminescence

Abstract: Detailed study of the luminescence of multiple brown CVD diamonds was performed. It has been found that the well-known optical center with zero-phonon line at 468 nm is a characteristic of brown color. It has been found that the defects responsible for 468 nm center are located within brown striations suggesting close relation of the 468 nm center and the vacancy clusters. Simultaneous reduction of the intensity of 468 nm center and brown color during annealing support the assumption of their close relation. Identical spectroscopic parameters of the 468 nm center and the radiation center with ZPL at 492 nm suggest that the former relates to an intrinsic defect probably containing vacancies. The distribution of intensity of the 468 nm center in some brown diamonds follows the distribution of the NV? center while being opposite to that of the NV0 center and the dislocation-related A-band. This observation suggests the negative charge state of the 468 nm center. Due to its high luminescence efficiency, the 468 nm center can be used as a highly sensitive indicator of the traces of vacancy clusters. We found that the 468 nm center is detected practically in every as-grown CVD diamond including colorless CVD diamonds of high structural perfection and high purity.
DS202105-0766
2021
Hills, S.Fluorescence microscopy: the revolution revolving.Carnegiescience.edu, June 8, 2pm. ESTGlobalfluorescence
DS202105-0777
2021
Modise, E.G., Zungeru, M.A., Chuma, J.M., Prabaharan, S.R.S., Mtengi, B., Ude, A., Nedev, Z.The new paradox of dual modality x-ray diamond sorting.IEEE Photonics Journal, Researchgate 35102286, April, 28p. PdfGloballuminescence

Abstract: Modern-day diamond sorting is achieved through the application of x-ray luminescence (XRL) and x-ray transmission (XRT) techniques. Sorting with XRL is limited to the class range of 1.25mm to 32mm because of self-absorption associated with larger diamonds, greater than 32mm. The effect of self-absorption is also a high-energy phenomenon in XRL. XRT is limited to sorting large size diamonds as the technique suffers poor contrast for diamonds smaller than 10mm. XRT measurements are immune to self-absorption for all sample sizes, while XRL measurements have good contrast for particles smaller than 32mm. The applications of these techniques have hitherto been used independently of each other and have subsequently progressed mutually exclusively. Here we analytically show a new paradox of a dual-modality X-ray diamond sorting combining XRL and XRT techniques' strengths. Key features of our new paradoxical model performance are contrast mitigation for small particles and self-absorption rejection for a large particle at high energy as well as improved particle detectability and classification.
DM202108-1367
2021
JCK OnlineThese glow in the dark diamonds are coming to luxury.jckonline.com, July 21, 3p.GlobalNews item - fluorescence
DS202109-1480
2021
McCallum, A.The importance of luminescence.Gems & Jewelery, Vol. 30, 2, pp. 32-26.Globalluminescence
DS202110-1603
2021
Borenstein, G., Oneal, S.Rare mixed type IaB-IIb diamond with a long-lasting phosphorescence. Stuller's Gem Lab.Gems & Gemology, Vol. 57, 2, summer pp. 178-179. gia.edu/gems-gemologyUnited States, Louisiannaluminescence
DS202110-1607
2021
Cowing, M.D.Diamond's spectral constellation. Reverse ray tracingGemmology Today, Vol. 1, 1, June pp. 24-31. Globalreflectance
DS202110-1626
2021
Luo, Y., Nelson, D., Ardon, T., Breeding, C.M.Measurement and characterization of the effects of blue fluorescence on diamond appearance. Gems & Gemology, Vol. 57, 2, summer pp. 102-123. gia.edu/gems-gemologyGlobalfluorescence
DS202111-1761
2020
Chanturia, V.A., Dvoichenkova, G.P., Morozov, V.V., Kovalchuk, O.E., Podkamennyi, Yu.A., Yakolev, V.N.Selective attachment of luminophore-bearing emulsion at diamonds - mechanism analysis and mode selection.Journal of Mining Science, Vol. 56, 1, pp. 96-103, 8p. PdfRussialuminescence

Abstract: The authors present an efficient modification method of X-ray fluorescence separation with mineral and organic luminophores used to adjust spectral and kinetic characteristics of anomalously luminescent diamonds. The mechanism of attachment of luminophores at diamonds and hydrophobic minerals is proved, including interaction between the organic component of emulsions and the hydrophobic surface of a treated object and the concentration of insoluble luminophore grains at the organic and water interface. Selective attachment of the luminophore-bearing organic phase of emulsion at the diamond surface is achieved owing to phosphatic dispersing agents. Tri-sodium phosphate and sodium hexametaphosphate added to emulsion reduce attachment of the luminophore-bearing organic phase at the surface of kimberlite minerals. It is shown that phosphate concentration of 1.0-1.5 g/l modifies and stabilizes spectral and kinematic parameters of kimberlite mineral on the level of initial values. This mode maintains the spectral and kinematic characteristics of anomalously luminescent diamonds at the wanted level to ensure extraction of diamonds to concentrate.
DS202112-1937
2021
Luo, Y.Quantifying diamond fluorescence and its visual impact.GIA Knowledge session, Dec. 16, 10 am PST utube to followGlobalflourescence
DS202203-0355
2022
Loginova, A.M., Serebryannikov, A.O., Sobolev, N.V.Compositional variations and rare paregeneses of multiple magnesiochromite inclusions in Yakutian diamonds.Doklady Earth Sciences, Vol. 501, pt. 1, pp. 919-924. pdfRussia, Yakutiacathodluminescence

Abstract: The zoning of diamonds was studied using cathodoluminescence (CL) and the chemical composition of mineral inclusions in six typical diamonds from kimberlites of Yakutia. The diamonds were ground on special equipment until inclusions with dimensions of 10-200 ?m were brought to the surface. The inclusions are characterized by a morphology reflecting the influence of the host diamonds. Multiple inclusions and intergrowths of magnesiochromite, olivine, pyrope, and phlogopite are located in both the central and peripheral zones of diamonds. In three diamonds, significant differences in the composition of magnesiochromites in different growth zones were observed, while in the other three such differences were not found. The overwhelming majority (five out of the six diamonds studied), according to the compositional features of magnesiochromite, olivine, and phlogopite, belong to the dunite-harzburgite paragenesis prevailing in diamonds from various diamond-bearing provinces of the Earth. In one of the diamonds, a lherzolite paragenesis, identified by the composition of the pyrope inclusion in magnesiochromite, was observed for the first time. The complex history of diamond growth and the variations in the chemical composition of the included minerals indicate the possibility of coexistence of syngenetic and protogenetic inclusions in the same diamond crystal.
DS202204-0540
2022
Van Rythoven, A.D., Schulze, D.J., Stern, R.A., Lai, M, Y.Composition of diamond from the 95-2 pipe, Lake Timiskaming kimberlite cluster, Superior craton, Canada.The Canadian Mineralogist, Vol. 60, pp. 67-90. pdfCanada, Ontariocathodluminenescence

Abstract: Forty-one samples of diamond from the Jurassic 95-2 kimberlite pipe in the Lake Timiskaming Kimberlite Cluster, Superior Craton, Canada, were imaged using cathodoluminescence and analyzed by secondary ion mass spectrometry and Fourier-transform infrared absorbance spectrometry to determine carbon stable isotope composition, total nitrogen abundance, and nitrogen aggregation state. The carbon isotope compositions results (?13CVPDB) range from -9.11 to -3.57‰, with a mean value of -5.8‰. Intra-stone variation is small (maximum ?2.2‰, and in most individual diamond samples <1‰). Nitrogen contents range from 0.5 to 2040 ppm (mean of 483 ppm). The greatest range of values in a single stone is 825 ppm. The samples are poorly aggregated in terms of nitrogen. The samples are mostly type IaA or IaAB, with a few bordering on type Ib. Diamond growth was episodic, with nitrogen behaving highly compatibly (i.e., D = [N]diamond/[N]fluid >> 1). Precipitation was likely from a carbonate-rich fluid in a peridotitic (lherzolitic) environment within the mantle of the central Superior Craton. This generation of diamond growth is very similar to those reported from the Jurassic age Victor and U2 pipes of the Attawapiskat Kimberlite Cluster, and distinct from a possibly much older (>1.1 Ga) generation of diamond reported in other older host rocks (T1, Wawa, Lynx, and Renard). This older generation of diamond at these other localities is also predominantly of the peridotitic (harzburgitic) paragenesis but contains far less nitrogen (although typically more aggregated as B centers) and has higher ?13CVPDB. The younger generation of diamond formed after mantle heating during formation of the Mid-Continental Rift (ca. 1.1 Ga) destroyed any proximal prior generation(s) of diamond. Igneous activity after 1.1 Ga subsequently refertilized the cratonic mantle to a lherzolitic paragenesis in which the younger generation precipitated.
DS202205-0674
2022
Boldyrev, K.N., Sedov, V.S., Vanpoucke, D.E.P., Ralchenko, V.G., Mavrin, B.N.Photoluminescence and first principles phonon study.Diamond and Related Materials, Vol. 126, 6p. PdfGlobalLuminescence

 
 

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