Low Temperature Structural Phase Transition of Ba₃NaIr₂O₉

Author(s)

Hans-Conrad zur Loye, University of South Carolina - ColumbiaFollow
Seung-Joo Kim, University of South Carolina - Columbia
Rene Macquart, University of South Carolina - Columbia
Mark D. Smith, University of South Carolina - ColumbiaFollow
Yongjae Lee, Yonsei University
Tom Vogt, University of South Carolina - Columbia

Document Type

Article

Subject Area(s)

Chemistry

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.

Digital Object Identifier (DOI)

https://doi.org/10.1016/j.solidstatesciences.2008.12.010

Publication Info

Published in Solid State Sciences, Volume 11, Issue 3, 2008, pages 608-613.

Rights

© Solid State Sciences 2008, Elsevier.

APA Citation

zur Loye, H.-C., Kim, S.-J., Macquart, R., Smith, M., Lee, Y., & Vogt, T. (2008). Low Temperature Structural Phase Transition of Ba3NaIr2O9. Solid State Sciences, 11(3), 608–613. https://doi.org/10.1016/j.solidstatesciences.2008.12.010