The effect of micro-strain and pressure medium on the high-pressure phase of GaSb

Angle dispersive X-ray diffraction experiments have been performed in a dia mond anvil cell using different pressure media and a large volume cell (Par is-Edinburgh cell) in order to determine the effect of pressure-temperature conditions on the high-pressure phase of the binary compound gallium antim onide GaSb. In particular, fine analysis of the diffraction patterns obtain ed at high pressure and/or temperature have clearly evidenced the importanc e of the pressure medium and of micro-strains which considerably modified t he structure at high pressure.