期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 184, 期 3, 页码 601-607出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2011.01.028
关键词
Post-perovskite; NaIrO3; High oxidation state; High pressure synthesis; Rietveld refinement; Electronic properties
资金
- NSF [DMR 0703095]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- Villum Kann Rasmussen foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1005438] Funding Source: National Science Foundation
Sodium iridium (V) oxide, NaIrO3, was synthesized by a high pressure solid state method and recovered to ambient conditions. It is found to be isostructural with CaIrO3, the much-studied structural analog of the high-pressure post-perovskite phase of MgSiO3. Among the oxide post-perovskites, NaIrO3 is the first example with a pentavalent cation. The structure consists of layers of corner- and edge-sharing IrO6 octahedra separated by layers of NaO8 bicapped trigonal prisms. NaIrO3 shows no magnetic ordering and resistivity measurements show non-metallic behavior. The crystal structure, electrical and magnetic properties are discussed and compared to known post-perovskites and pentavalent perovskite metal oxides. Published by Elsevier Inc.
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