Raman Identification of Lonsdaleite in Popigai Impactites
Full article
| Common |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Journal of Raman Spectroscopy
ISSN: 0377-0486
, E-ISSN: 1097-4555
|
| Output data |
Year: 2014,
Volume: 45,
Number: 4,
Pages: 305-313
Pages count
: 9
DOI:
10.1002/jrs.4457
|
| Tags |
impact diamond, lonsdaleite, Raman spectroscopy, X-ray diffraction |
| Authors |
Goryainov S.V.
1
,
Likhacheva A.Yu.
1,2
,
Rashchenko S.V.
1
,
Shubin A.A.
3
,
Afanasʹev V.P.
1
,
Pokhilenko L.N.
1
|
| Affiliations |
| 1 |
V.S. Sobolev Institute of Geology and Mineralogy SB RAS, pr. Acad. Koptyug 3, Novosibirsk 630090, Russia
|
| 2 |
Siberian Synchrotron and Terahertz Radiation Centre, Budker Institute of Nuclear Physics SB RAS, prospect Acad. Lavrentiev 11, Novosibirsk 630090, Russia
|
| 3 |
Boreskov Institute of Catalysis SB RAS, prospect Acad. Lavrentiev 5, Novosibirsk 630090, Russia
|
|
Funding (3)
|
1
|
Russian Foundation for Basic Research
|
13-05-00568
|
|
2
|
Russian Foundation for Basic Research
|
14-05-00616
|
|
3
|
The Ministry of Education and Science of the Russian Federation
|
|
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 cm−1 was ascribed to A1g vibration mode of lonsdaleite, whereas the less intense band at 1219–1244 cm−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.