Pressure induced phase transformation in U2O(PO4)2

Mishra, A. K. ; Murli, Chitra ; Singhal, A. ; Sharma, Surinder M. (2008) Pressure induced phase transformation in U2O(PO4)2 Journal of Solid State Chemistry, 181 (5). pp. 1240-1248. ISSN 0022-4596

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jssc.2008.02.020

Abstract

The high pressure behavior of U2O(PO4)2 has been investigated with the help of Raman scattering and X-ray diffraction measurements up to ~14 and 6.5 GPa, respectively. The observed changes in the Raman spectra as well as the X-ray diffraction patterns suggest that U2O(PO4)2 undergoes a phase transition at ~6 GPa to a mixture of a disordered ambient pressure phase and a new high pressure phase. The new phase resembles the triclinic mixed-valence phase of uranium orthophosphate (U(UO2)(PO4)2). On release of pressure the initial phase is not retrieved.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:U2O(PO4)2; Phase Transition; Raman Scattering; X-ray Diffraction
ID Code:48214
Deposited On:14 Jul 2011 08:32
Last Modified:14 Jul 2011 08:32

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