Low temperature structural phase transition of Ba3NaIr2O9

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

doi:10.1016/j.solidstatesciences.2008.12.010

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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7 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	608-613
Number of pages	6
Journal	Solid State Sciences
Volume	11
Issue number	3
DOIs	https://doi.org/10.1016/j.solidstatesciences.2008.12.010
Publication status	Published - 2009 Mar 1

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All Science Journal Classification (ASJC) codes

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

Cite this

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

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abstract = "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.",

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AU - Lee, Yongjae

AU - Vogt, Tom

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AB - 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.

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10.1016/j.solidstatesciences.2008.12.010