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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9 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

Bibliographical note

Funding Information:
This work was supported by the Department of Energy through grant DE-FG02-04ER46122 and the National Science Foundation through grant DMR: 0450103 and DMR: 0804209. Y. Lee thanks support by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) (KRF-2006-D00538).

All Science Journal Classification (ASJC) codes

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

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