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Mineral Chemistry of Mahadevpur H4/5 Chondrite: Characterization of Nanodia­monds Through Micro-raman Spectroscopic Studies


Affiliations
1 Department of Physics, Anandaram Dhekial Phookan College, Nagaon 782 002, India
2 School of Natural and Engineering Sciences, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, India
3 Centre of Advanced Study in Geology, Institute of Science, Banaras Hindu University, Varanasi 221 005, India, India
4 Centre of Advanced Study in Geology, Institute of Science, Banaras Hindu University, Varanasi 221 005, India
5 Department of Physics, Nagaon University, Nagaon 782 001, India

Here, we present comprehensive electron probe micro analysis, laser Raman spectroscopic and X-ray diffraction (XRD) studies on the Mahadevpur H4/5 chondrite. The calculated full width at half maximum (FWHM) value of ~14–17 cm–1 for the Raman peaks in the Mahadevpur meteorite is in accordance with the shock stage of S4 with medium shock pressure regime of 30–35 GPa. The nanodiamonds were characterized with the observation of Raman peaks at 1333–1358 cm–1 and 1600 cm–1. The FWHM value of the Raman peaks reflects shock meta­morphism in the meteorite. The XRD technique provides further independent validation of the nanodiamonds.

Keywords

Chondrite, mineral chemistry, nanodiamonds, shock metamorphism, spectroscopic analysis
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  • Mineral Chemistry of Mahadevpur H4/5 Chondrite: Characterization of Nanodia­monds Through Micro-raman Spectroscopic Studies

Abstract Views: 25  | 

Authors

Bhaskar J. Saikia
Department of Physics, Anandaram Dhekial Phookan College, Nagaon 782 002, India
G. Parthasarathy
School of Natural and Engineering Sciences, National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, India
N. V. Chalapathi Rao
Centre of Advanced Study in Geology, Institute of Science, Banaras Hindu University, Varanasi 221 005, India, India
Vikas Seth
Centre of Advanced Study in Geology, Institute of Science, Banaras Hindu University, Varanasi 221 005, India
Rashmi R. Borah
Department of Physics, Nagaon University, Nagaon 782 001, India

Abstract


Here, we present comprehensive electron probe micro analysis, laser Raman spectroscopic and X-ray diffraction (XRD) studies on the Mahadevpur H4/5 chondrite. The calculated full width at half maximum (FWHM) value of ~14–17 cm–1 for the Raman peaks in the Mahadevpur meteorite is in accordance with the shock stage of S4 with medium shock pressure regime of 30–35 GPa. The nanodiamonds were characterized with the observation of Raman peaks at 1333–1358 cm–1 and 1600 cm–1. The FWHM value of the Raman peaks reflects shock meta­morphism in the meteorite. The XRD technique provides further independent validation of the nanodiamonds.

Keywords


Chondrite, mineral chemistry, nanodiamonds, shock metamorphism, spectroscopic analysis



DOI: https://doi.org/10.18520/cs%2Fv126%2Fi5%2F574-582