Raman study of pressure-induced phase transitions in RbIO4

Chandrabhas, N. ; Sood, Ajay K. (1995) Raman study of pressure-induced phase transitions in RbIO4 Physical Review B: Condensed Matter and Materials Physics, 51 (14). pp. 8795-8800. ISSN 1098-0121

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Official URL: http://prb.aps.org/abstract/PRB/v51/i14/p8795_1

Related URL: http://dx.doi.org/10.1103/PhysRevB.51.8795


The pressure dependence of the Raman spectra of RbIO4 has been investigated up to 27.3 GPa at room temperature using the diamond-anvil cell. The changes in the Raman spectra show clearly two pressure-induced phase transitions at 5.3 GPa from scheelite to pseudoscheelite and at 7.2 GPa from pseudoscheelite to wolframite. There is an indication of a possible phase transition at 18.3 GPa from wolframite to a denser complex structure. These transitions follow the same sequence as in other compounds such as alkali perrehenates, which crystallize in the scheelite structure. The systematics in pressure-induced phase transitions in alkali periodates is discussed.

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