ON UNUSUAL DEEP-VIOLET MICROCRYSTALS OF DIAMONDS FROM PLACERS OF UKRAINE
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dc.contributor.author | Taran M.N. | |
dc.contributor.author | Kvasnytsya V.M. | |
dc.contributor.author | Langer K. | |
dc.date.accessioned | 2022-07-08T03:37:09Z | |
dc.date.available | 2022-07-08T03:37:09Z | |
dc.date.issued | 2004 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=27774796 | |
dc.identifier.citation | European Journal of Mineralogy, 2004, 16, 2, 241-245 | |
dc.identifier.issn | 0935-1221 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/37983 | |
dc.description.abstract | A distinctive feature of Ukrainian deep-violet diamond microcrystals is a broad absorption band centered at about 560 nm (17850cm(-1) or 2.21 eV). In the Ukrainian samples, the intensity of this band is almost two orders of magnitude greater than in a light-rose diamond from Yakutia. Previously (Taran et al., 1998), the band was attributed to the N-V center because the absorption spectrum of the negative N-V center in irradiated and annealed type Ib diamonds is known to have an absorption band with a maximum at a similar wavelength. However, this assignment is not confirmed by vibrational spectroscopy and low temperature optical absorption spectroscopy in all crystals studied. In addition, at similar to77 K the band 17850 cm(-1) displays no fine structure that unambiguously evidences that it can not be the band at similar to2.2 eV, commonly attributed to the N-V center. | |
dc.subject | diamond | |
dc.title | ON UNUSUAL DEEP-VIOLET MICROCRYSTALS OF DIAMONDS FROM PLACERS OF UKRAINE | |
dc.type | Статья |
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