High pressure and high temperature X-ray diffraction study of InAs

The bulk of high pressure experimental data available on A((n))B((8-n)) compounds refers to room temperature (RT) measurements. The P-T phase diagram remains therefore largely unexplored, whereas the few pioneering combined high pressure and temperature investigations are opening a new insight in the structural systematics of this class of compounds. The goal of this work was to investigate the role of temperature in the ZB --> NaCl phase transition in the InAs compound, using energy dispersive X-ray diffraction measurements, and to explore its high pressure behaviour at high temperatures. Our data show that the RT structural sequence is preserved up to T = 470 K but not at T similar to 600 K. (C) 2002 Elsevier Science B.V. All rights reserved.