This article is cited in 4 papers

CONDENSED MATTER

Raman spectroscopy of nanopolycrystalline diamond produced from shungite at 15 GPa and 1600$^\circ$ C

V. P. Afanas'ev^a, K. D. Litasov^b, S. V. Goryainov^a, V. V. Kovalevskii<sup>c

a</sup> Sobolev Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
^b Vereshchagin Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow, 108840 Russia
^c Institute of Geology, Karelian Scientific Center, Russian Academy of Sciences, Petrozavodsk, 185610 Russia

Abstract: It has been demonstrated that the high-pressure (15 GPa) treatment of shungite samples (Karelia, Russia) at a temperature of 1600$^\circ$ C for 2 h transforms them to diamond. The comparison of the Raman spectra of the diamond material prepared from shungite and carbonado, which is a rare variety of cubic diamond sometimes called black diamond, has revealed their significant similarities. Our data indicate the possible growth of carbonado from the shungite-like natural material, which may be one of the ways carbonado appears under terrestrial conditions.

Received: 30.12.2019
Revised: 23.01.2020
Accepted: 23.01.2020

DOI: 10.31857/S0370274X20040050

 English version: Journal of Experimental and Theoretical Physics Letters, 2020, 111:4, 218–224

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