Low temperature structural phase transition of Ba3NaIr2O9

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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)608-613
Number of pages6
JournalSolid State Sciences
Volume11
Issue number3
DOIs
Publication statusPublished - 2009 Mar 1

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Phase transitions
symmetry
ambient temperature
broken symmetry
synchrotrons
x rays
cooling
Temperature
probes
single crystals
room temperature
cells
diffraction
Synchrotrons
X ray powder diffraction
temperature
Single crystals
Cooling
X rays

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
zur Loye, Hans Conrad ; Kim, Seung Joo ; Macquart, Rene ; Smith, Mark D. ; Lee, Yongjae ; Vogt, Tom. / Low temperature structural phase transition of Ba3NaIr2O9. In: Solid State Sciences. 2009 ; Vol. 11, No. 3. pp. 608-613.
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zur Loye, HC, Kim, SJ, Macquart, R, Smith, MD, Lee, Y & Vogt, T 2009, 'Low temperature structural phase transition of Ba3NaIr2O9', Solid State Sciences, vol. 11, no. 3, pp. 608-613. https://doi.org/10.1016/j.solidstatesciences.2008.12.010

Low temperature structural phase transition of Ba3NaIr2O9. / zur Loye, Hans Conrad; Kim, Seung Joo; Macquart, Rene; Smith, Mark D.; Lee, Yongjae; Vogt, Tom.

In: Solid State Sciences, Vol. 11, No. 3, 01.03.2009, p. 608-613.

Research output: Contribution to journalArticle

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AU - zur Loye, Hans Conrad

AU - Kim, Seung Joo

AU - Macquart, Rene

AU - Smith, Mark D.

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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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