Pressure and temperature-dependent structural studies of Ba 2BiTaO6

Kia S. Wallwork, Brendan J. Kennedy, Qingdi Zhou, Yongjae Lee, Thomas Vogt

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31 Citations (Scopus)

Abstract

The ordered double perovskite Ba2BiTaO6 is shown to undergo a first-order rhombohedral (R 3̄) to monoclinic (I2/m) phase transition, which can be induced by either lowering the temperature or through the application of pressure. The structures in both phases have been refined from high resolution neutron powder diffraction data at various temperatures, while the high pressure measurements utilised synchrotron X-ray diffraction data. The rhombohedral structure is characterised by out-of-phase tilts about the [111] axis. In the monoclinic structure the tilt axis has changed to be about the [110] axis; however, the magnitude of the tilts in the two structures is remarkably similar. Crown

Original languageEnglish
Pages (from-to)207-211
Number of pages5
JournalJournal of Solid State Chemistry
Volume178
Issue number1
DOIs
Publication statusPublished - 2005 Jan

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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