High-pressure synthesis of boron-rich chalcogenides B12S and B12Se

Abstract

Two boron-rich chalcogenides B12S and B12Se isostructural to α-rhombohedral boron were synthesized by chemical reaction of the elements at high-pressure – high-temperature conditions. The crystal structures and stoichiometries of both compounds were confirmed by Rietveld refinement of synchrotron X-ray diffraction data and elemental analysis. The experimental Raman spectra of B12S and B12Se were investigated for the first time. All observed Raman bands have been attributed to the theoretically calculated phonon modes, and the mode assignment has been performed.--//-- This is accepted version of the article Kirill A. Cherednichenko, Vladimir A. Mukhanov, Aleksandr Kalinko, Vladimir L. Solozhenko; High-pressure synthesis of boron-rich chalcogenides B12S and B12Se; Journal of Alloys and Compounds, Volume 898, 2022, 162874, ISSN 0925-8388, https://doi.org/10.1016/j.jallcom.2021.162874.(https://www.sciencedirect.com/science/article/pii/S0925838821042845). Published under the CC BY-NC-ND license.