Pressure-induced structural transformations in the molybdate Sc-2(MoO4)(3)

W. Paraguassu, M. Maczka, A. G. Sonza Filho, P. T. L. Freire, J. M. Filho, F. E. A. Melo, L. Macalik, Leif Gerward, J. Staun Olsen, A. Waskowska, J. Hanuza

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Abstract

High pressure Raman scattering and x-ray diffraction studies of the molybdate Sc-2(MoO4)(3) are presented. A sequence of changing symmetry effects is observed through two structural phase transitions ending up with an amorphous state. The observed two structural phase transformations are reversible. The crystal to amorphous transition is irreversible. Our results point out that the amorphization process in Sc-2(MoO4)(3) may be due to a kinetic hindrance of a phase transition rather than due to chemical decomposition effects as have been proposed to occur for some molybdates and tungstates.
Original languageEnglish
JournalPhysical Review B Condensed Matter
Volume69
Issue number9
Pages (from-to)094111
ISSN0163-1829
DOIs
Publication statusPublished - 2004

Bibliographical note

Copyright (2004) American Physical Society.

Keywords

  • CONDUCTIVITY
  • ZRW2O8
  • SC-2(WO4)(3)
  • NEGATIVE THERMAL-EXPANSION
  • CRYSTALS
  • BEHAVIOR
  • TUNGSTATE
  • PHASE-TRANSITIONS
  • INDUCED AMORPHIZATION

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