Mineral chemistry of Mahadevpur H4/5 chondrite: characterization of nanodiamonds through micro-Raman spectroscopic studiesOPEN ACCESS 

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Bhaskar J. Saikia, G. Parthasarathy, N.V. Chalapathi Rao, Vikas Seth, Rashmi Rekha Borah

CURRENT SCIENCE, VOL. 126, NO. 5, 10 MARCH 2024

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“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 meta-morphism in the meteorite. The XRD technique provides further independent validation of the nanodiamonds.”

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