| Инд. авторы: | Goryainov S.V., Likhacheva A.Y., Rashchenko S.V., Shubin A.S., Afanasev V.P., Pokhilenko N.P. |
| Заглавие: | Raman identification of lonsdaleite in Popigai impactites |
| Библ. ссылка: | Goryainov S.V., Likhacheva A.Y., Rashchenko S.V., Shubin A.S., Afanasev V.P., Pokhilenko N.P. Raman identification of lonsdaleite in Popigai impactites // Journal of Raman Spectroscopy. - 2014. - Vol.45. - Iss. 4. - P.305-313. - ISSN 0377-0486. - EISSN 1097-4555. |
| Внешние системы: | DOI: 10.1002/jrs.4457; SCOPUS: 2-s2.0-84897989510; WoS: 000334156000006; |
| Реферат: | eng: Micro-Raman spectroscopy and X-ray diffraction method (XRD) were used to characterize impact carbonaceous rocks excavated from the Popigai crater (Siberia). The deconvolution of the first-order Raman spectra of the rocks containing different amounts of carbon phases (diamond, lonsdaleite and graphite) allowed the identification of lonsdaleite spectrum. The most intensive band at 1292-1303-1 was ascribed to A1g vibration mode of lonsdaleite, whereas the less intense band at 1219-1244-1 was attributed, in agreement with previously reported ab initio calculations, to E2g vibration mode. The established correlation between the intensities of Raman and XRD peaks permits a rough estimation of lonsdaleite/diamond phase ratio in the impact rocks using micro-Raman measurements. The second-order Raman spectra of lonsdaleite-diamond rocks were recorded. Copyright © 2014 John Wiley & Sons, Ltd.
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| Ключевые слова: | X-ray diffraction; Raman spectroscopy; lonsdaleite; impact diamond; |
| Издано: | 2014 |
| Физ. характеристика: | с.305-313 |