High-pressure phase transition in gallium phosphide: An x-ray-absorption spectroscopy study

Abstract

High-pressure behavior of GaP has been studied by x-ray-absorption spectroscopy in a diamondanvil cell up to 36 GPa. The room-temperature equation of state of phase I has been determined.The transition from a fourfold (zinc-blende) to a sixfold (P-tin) coordination scheme is observed near 26 GPa. Analysis of the data obtained on a sample quickly depressurized from 36 GPa shows that the transition is not reversible and the recovered sample is mainly amorphous.

Determination of the phase boundary of GaP using in situ high pressure and high-temperature X-ray diffraction

“…The physical properties of the zinc-blende structure in GaP have been studied by X-ray diffraction, resistivity measurements, X-ray absorption, Raman scattering, and ultrasonics [e.g. [3][4][5][6][7][8][9]. The transition from semiconducting to the metallic phase around 22 GPa has been confirmed repeatedly by previous studies [e.g.…”

Trace element partitioning between carbonatitic melts and mantle transition zone minerals: Implications for the source of carbonatites

“…The 15 and 20 GPa experiments were performed with a 10/4 assembly calibrated against the forsterite b-c transition (Katsura and Ito, 1989;Irifune et al, 1996;Katsura et al, 2003). The 25 GPa experiments were performed with a 7/2.5 assembly calibrated against the ZnS transition (Pan et al, 2002), GaAs transition (Mc Mahon et al, 1998) and GaP transition (Itie et al, 1989). Our high temperature calibration of this assembly is incomplete and we have reported the pressure on the basis of the room temperature calibration.…”

High-pressure phases of group-IV, III–V, and II–VI compounds

“…No further changes have been observed up to a pressure of 52 GPa. Rapid depressurization results in a mainly amorphous sample (Itié et al, 1989).…”