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In situ pressure-induced solid-state amorphization in Sm2(MoO4)3, Eu2(MoO4)3 and Gd2(MoO4)3 crystals: chemical decomposition scenario |
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| Authors: | Vladimir Dmitriev Vitaly Sinitsyn Denis Machon Eugeny Ponyatovsky Hans Peter Weber |
| Affiliation: | a Group “Structure of Materials under Extreme Conditions”, Swiss-Norwegian Beam Lines at ESRF, BP 220, F-38043 Grenoble, France b LEPMI/ENSEEG, F-38402 Saint Martin d'Heres, France c Institute of Solid State Physics of the Russian Academy of Sciences, Chernogolovka, Moscow District 142432, Russian Federation d Institute of Crystallography, University of Lausanne, CH-1015 Lausanne, Switzerland |
| Abstract: | The effect of pressure on the phase transformations in Sm2(MoO4)3, Gd2(MoO4)3 and Eu2(MoO4)3 crystals has been studied in situ using synchrotron radiation. All three isostructural compounds undergo a structural phase transition at 2.2-2.8 GPa to a new phase, which is interpreted as a possible precursor of amorphization. Amorphization in these crystals occurs irreversibly over a wide pressure range, and its mechanism, interpreted as a chemical decomposition, is found to be weakly affected by the degree of hydrostaticity. |
| Keywords: | A. Disordered systems C. X-ray diffraction D. Phase transitions E. High pressure |
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