NaIrO3 - A pentavalent post-perovskite

M. Bremholm; S. E. Dutton; P. W. Stephens; R. J. Cava

doi:10.1016/j.jssc.2011.01.028

NaIrO3 - A pentavalent post-perovskite

Materials Science 2011-02-02 v2

Authors: M. Bremholm , S. E. Dutton , P. W. Stephens , R. J. Cava

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Abstract

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 analogue 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.

Cite

@article{arxiv.1011.5125,
  title  = {NaIrO3 - A pentavalent post-perovskite},
  author = {M. Bremholm and S. E. Dutton and P. W. Stephens and R. J. Cava},
  journal= {arXiv preprint arXiv:1011.5125},
  year   = {2011}
}

Comments

22 pages, 5 figures. Submitted to Journal of Solid State Chemistry

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