High-pressure Raman study of Al2(WO4)3 |
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Authors: | M Maczka W Paraguassu PTC Freire FEA Melo |
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Abstract: | A high-pressure Raman scattering study of the tungstate Al2(WO4)3 is presented. This study showed the onset of two reversible phase transitions at 0.28±0.07 and 2.8±0.1 GPa. The pressure evolution of Raman bands provides strong evidences that both the transitions involve rotations/tilts of nearly rigid tungstate tetrahedra and that the structure of the stable phase in the 0.28-2.8 GPa range may be the same as the structure of the ambient pressure, low-temperature monoclinic (C2h5) ferroelastic phase of Al2(WO4)3. |
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Keywords: | High pressure Phase transition Raman spectra |
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