Phase Transformation of BeS to the NiAs Structure at High Pressure

Chandrabhas Narayana; Victor Nesamony; Arthur L. Ruoff

doi:10.4131/jshpreview.7.322

The Review of High Pressure Science and Technology

Online ISSN : 1348-1940
Print ISSN : 0917-639X
ISSN-L : 0917-639X

Phase Transformation of BeS to the NiAs Structure at High Pressure

Chandrabhas Narayana, Victor Nesamony, Arthur L. Ruoff

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Keywords: phase transition, NiAs structure, equation of state, transition pressure dependence on ionic radius ratio

JOURNAL FREE ACCESS

1998 Volume 7 Pages 322-324

DOI https://doi.org/10.4131/jshpreview.7.322

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Abstract

Pressure-induced transitions have previously been observed at room temperature in all the alkaline chalcogenides except MgS, MgO, BeS and BeO. This paper reports on studies to 96 GPa on BeS in which a phase transformation from the four-fold zincblende structure occurs at 51 ± 8 GPa to the six-fold nickel arsenide structure, which persists to the highest pressure studied. The equation of state is given.

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