An investigation of non-stoicheiometry in the systems SrFeO3 –yand SrCoO3 –yby iron and cobalt K-edge extended X-ray absorption fine structure spectroscopy
- 1 January 1988
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 1,p. 83-87
- https://doi.org/10.1039/dt9880000083
Abstract
A series of samples in the SrFeO3 –y(perovskite and brownmillerite) and SrCoO3 –y(hexagonal and brownmillerite) systems has been studied by extended X-ray absorption fine structure spectroscopy. In the cobalt system, evidence has been found for the existence of face-sharing CoO6 octahedra in the substoicheiometric low-temperature phase H–Sr2Co2O5 –x, and for both face- and edge-sharing CoO6 octahedra in H–Sr2Co2O5 +x. In the iron system, the perovskite phases show only corner-sharing polyhedra, and the short-range structure is seen to be more closely related to the brownmillerite structure.Keywords
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