NaIrO{sub 3}-A pentavalent post-perovskite

Journal Article · Tue Mar 15 00:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.01.028· OSTI ID:21494224

Bremholm, M ^[1]; Dutton, S E ^[1]; Stephens, P W ^[2]; Cava, R J ^[1]

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1. Department of Chemistry, Princeton University, Princeton, NJ 08544 (United States)
2. Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794 (United States)

Sodium iridium (V) oxide, NaIrO{sub 3,} was synthesized by a high pressure solid state method and recovered to ambient conditions. It is found to be isostructural with CaIrO{sub 3}, the much-studied structural analog of the high-pressure post-perovskite phase of MgSiO{sub 3}. Among the oxide post-perovskites, NaIrO{sub 3} is the first example with a pentavalent cation. The structure consists of layers of corner- and edge-sharing IrO{sub 6} octahedra separated by layers of NaO{sub 8} bicapped trigonal prisms. NaIrO{sub 3} 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. -- Graphical abstract: Sodium iridium(V) oxide, NaIrO{sub 3}, synthesized by a high pressure solid state method and recovered to ambient conditions is found to crystallize as the post-perovskite structure and is the first example of a pentavalent ABO{sub 3} post-perovskite. Research highlights: {yields} NaIrO{sub 3} post-perovskite stabilized by pressure. {yields} First example of a pentavalent oxide post-perovskite. {yields} Non-metallic and non-magnetic behavior of NaIrO{sub 3}.

• OSTI ID: 21494224
• Journal Information: Journal of Solid State Chemistry, Vol. 184, Issue 3; Other Information: DOI: 10.1016/j.jssc.2011.01.028; PII: S0022-4596(11)00029-6; Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CATIONS
CRYSTAL STRUCTURE
IRIDIUM OXIDES
LAYERS
MAGNESIUM SILICATES
MAGNETIC PROPERTIES
MAGNETIZATION
PEROVSKITE
PRISMS
SODIUM OXIDES
SYNTHESIS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
IONS
IRIDIUM COMPOUNDS
MAGNESIUM COMPOUNDS
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITES
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
SILICATES
SILICON COMPOUNDS
SODIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS