Unusual Coexistence of Nickel(II) and Nickel(IV) in the Quadruple Perovskite Ba4Ni2Ir2O12 Containing Ir2NiO12 Mixed-Metal-Cation Trimers

The crystal chemistry and magnetic properties of two hexagonal nickel­(IV)-containing perovskites, Ba4Ni1.94Ir2.06O12 and BaNiO3, are reported. The 12R perovskite, Ba4Ni1.94Ir2.06O12, possesses an unexpected coexistence of nickel­(II) and nickel­(IV). This quadruple perovskite structure contains Ir2...

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Published inInorganic chemistry Vol. 57; no. 6; pp. 2973 - 2976
Main Authors Ferreira, Timothy, Heald, Steve M, Smith, Mark. D, zur Loye, Hans-Conrad
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 19.03.2018
American Chemical Society (ACS)
Subjects
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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Summary:The crystal chemistry and magnetic properties of two hexagonal nickel­(IV)-containing perovskites, Ba4Ni1.94Ir2.06O12 and BaNiO3, are reported. The 12R perovskite, Ba4Ni1.94Ir2.06O12, possesses an unexpected coexistence of nickel­(II) and nickel­(IV). This quadruple perovskite structure contains Ir2NiO12 mixed-metal-cation units in which direct metal–metal bonding between nickel­(IV) and iridium­(V) is inferred. X-ray absorption near-edge spectroscopy and X-ray photoelectron spectroscopy measurements were conducted to confirm the simultaneous presence of nickel­(II) and nickel­(IV).
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AC02-06CH11357; DMR-1301757; OIA-1655740
USDOE Office of Science (SC)
National Science Foundation (NSF)
ISSN:0020-1669
1520-510X
1520-510X
DOI:10.1021/acs.inorgchem.8b00249