Low temperature structural phase transition of Ba3NaIr2O9

Hans Conrad zur Loye, Seung Joo Kim, Rene Macquart, Mark D. Smith, Yongjae Lee, Tom Vogt

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Single crystal X-ray and synchrotron X-ray powder diffraction have been used to probe the structure of Ba3NaIr2O9 from 300 K down to 20 K. Ba3NaIr2O9 is found to undergo a structural transition from hexagonal symmetry, P63/mmc, at ambient temperature to monoclinic symmetry, C2/c, at low temperature. The evolution of the unit cell volume upon cooling is indicative of a higher order structural transition, and the symmetry breaking becomes apparent as the temperature is decreased. The low temperature monoclinic structure of Ba3NaIr2O9 contains strongly distorted [NaO6] and [IrO6] octahedra in comparison to the room temperature hexagonal structure.

Original languageEnglish
Pages (from-to)608-613
Number of pages6
JournalSolid State Sciences
Issue number3
Publication statusPublished - 2009 Mar 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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    zur Loye, H. C., Kim, S. J., Macquart, R., Smith, M. D., Lee, Y., & Vogt, T. (2009). Low temperature structural phase transition of Ba3NaIr2O9. Solid State Sciences, 11(3), 608-613. https://doi.org/10.1016/j.solidstatesciences.2008.12.010