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The European Physical Journal B
ISSN: 1434-6028 (printed version)
ISSN: 1434-6036 (electronic version)
Abstract Volume 1 Issue 3 (1998) pp 265-268
rapid note: On the high-pressure phase transition in $\mathsf{GaPO_ 4}$
J. Badro (1)(2) (a), J.P. Itié (2), A. Polian (2)
(1) Laboratoire de Sciences de la Terre(CNRS UMR 5570), École normale supérieure de Lyon, 46 allée d'Italie, 69364 Lyon Cedex 07, France
(2) Physique des Milieux Condensés (CNRS URA 782), Université Pierre et Marie Curie, B77, 4 place Jussieu, 75252 Paris Cedex 05, France
Received: 7 October 1997 / Received in final form: 17 November 1997 / Accepted: 18 November 1997
Abstract: X-ray diffraction (XRD) experiments have been carried out on quartz-like $\alpha -$GaPO4 at high pressure and room temperature. A transition to a high pressure disordered crystalline form occurs at 13.5 GPa. Slight heating using a YAG infrared laser was applied at 17 GPa in order to crystallize the phase in its stability field. The structure of this phase is orthorhombic with space group Cmcm. The cell parameters at the pressure of transition are a=7.306 Å, b=5.887 Å and c=5.124 Å.
PACS. 62.50.+p High-pressure and shock-wave effects in solids and liquids - 61.50.Ks Crystallographic aspects of phase transformations; pressure effects - 61.10.-i X-ray diffraction and scattering
(a) email: james.badro@ens-lyon.fr
Online publication: February 24, 1998
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