Pressure induced phase transformation in U2O(PO4)2 |
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| Authors: | A.K. Mishra Chitra Murli Surinder M. Sharma |
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| Affiliation: | a High Pressure Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
b Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India |
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| 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. |
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| Keywords: | U2O(PO4)2 Phase transition Raman scattering X-ray diffraction |
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