Reduced forms of LaNiO3perovskite. Part 2.—X-ray structure of LaNiO2and extended X-ray absorption fine structure study: local environment of monovalent nickel
- 1 January 1983
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 79 (8) , 1195-1203
- https://doi.org/10.1039/f29837901195
Abstract
One of the products of the reduction of LaNiO3 is LaNiO2, containing monovalent nickel. This valence state of nickel has scarcely been observed in mineral compounds. X-ray data from powder samples and extended X-ray absorption fine structure studies (EXAFS) allow one to define a tetragonal structure with lanthanum at the centre of a prism composed of oxygen atoms having a square base and nickel in the centre of the square. The Ni—O distance (nearest neighbour) was found to be 1.983 Å for this monovalent nickel.Keywords
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