Unusual Coexistence of Nickel(II) and Nickel(IV) in the Quadruple Perovskite Ba4Ni2Ir2O12 Containing Ir2NiO12 Mixed-Metal-Cation Trimers
Journal Article
·
· Inorganic Chemistry
- Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemistry and Biochemistry
- Argonne National Lab. (ANL), Argonne, IL (United States). X-ray Science Division, Advanced Photon Source (APS)
In this paper, 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. Finally, 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).
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of South Carolina, Columbia, SC (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- Grant/Contract Number:
- AC02-06CH11357; DMR-1301757; OIA-1655740
- OSTI ID:
- 1433915
- Journal Information:
- Inorganic Chemistry, Vol. 57, Issue 6; ISSN 0020-1669
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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