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On unusual deep-violet microcrystals of diamonds from placers of Ukraine

Michail N. Taran, Victor M. Kvasnytsya and Klaus Langer
On unusual deep-violet microcrystals of diamonds from placers of Ukraine
European Journal of Mineralogy (April 2004) 16 (2): 241-245


Ukrainian deep-violet diamond crystals have a distinctive broad absorption band centred at approximately 560 nm (17850 cm (super -1) or 2.21 eV). The intensity of this band is almost two orders of magnitude greater than that in a light rose diamond from Yakutia. Although previously this band was attributed to to the N-V centre because the absorption spectrum of the negative N-V centre in irradiated and unannealed type Ib diamonds is known to have an absorption band with a maximum at a similar wavelength, this assignment is not confirmed. At approximately 77 K, the 17850 cm (super -1) band displays no fine structure that unambiguously shows that it cannot be the band at approximately 2.2 eV, commonly attributed to the N-V centre. This band is probably caused by 'plastic deformation', typical of pink diamonds from the Argyle field.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 16
Serial Issue: 2
Title: On unusual deep-violet microcrystals of diamonds from placers of Ukraine
Affiliation: National Academy of Sciences of Ukraine, Institute of Geochemistry, Mineralogy and Ore Formation, Kiev, Ukraine
Pages: 241-245
Published: 200404
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 17
Accession Number: 2004-042025
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N45°00'00" - N51°00'00", E28°00'00" - E39°00'00"
Secondary Affiliation: Technische Universitaet, DEU, Federal Republic of Germany
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 200412
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