Pressure-induced phase transitions in KDy(MoO4)2 and KY(MoO4)2: A high-pressure Raman study

A. Jayaraman, S. K. Sharma, S. Y. Wang, S. R. Shieh, L. C. Ming, Sang-Wook Cheong

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Abstract

High-pressure Raman studies on potassium-rare earth double molybdates, KDy(MoO4)2 and KY(MoO4)2, up to 35 GPa are reported. The Raman data indicate the occurrence of a reversible pressure-induced phase transition near 3 GPa, from the orthorhombic Pbcn phase. High-pressure x-ray diffraction measurements suggest that the new phase is also orthorhombic and has a smaller volume. The phase transition is structurally similar to that observed in KTb(MoO4)2 near 3 GPa and seems to be characteristic of the layer-type orthorhombic, potassium-heavy rare earth dimolybdates. Changes in optical transmission observed in all three dimolybdates are compared and discussed.

Original languageEnglish (US)
Pages (from-to)485-490
Number of pages6
JournalJournal of Raman Spectroscopy
Volume27
Issue number6
DOIs
Publication statusPublished - Jun 1996

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Spectroscopy

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