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Microstructural variations as a function of δ in La2−xSrxNiO4+δ

Published online by Cambridge University Press:  03 March 2011

M.J. Sayagués,
A. Caneiro,
J.M. González-Calbet and
M. Vallet-Regí
M.J. Sayagués
Affiliation:
Instituto de Magnetismo Aplicado, Apdo. 155, Las Rozas, 28230 Madrid, and Departamento de Química Inorgánica, Facultad de Químicas, Universidad Complutense, 28040 Madrid, Spai
A. Caneiro*
Affiliation:
Instituto de Magnetismo Aplicado, Apdo. 155, Las Rozas, 28230 Madrid, Spai
J.M. González-Calbet
Affiliation:
Instituto de Magnetismo Aplicado, Apdo. 155, Las Rozas, 28230 Madrid, and Departamento de Química Inorgánica, Facultad de Químicas, Universidad Complutense, 28040 Madrid, Spai
M. Vallet-Regí
Affiliation:
Instituto de Magnetismo Aplicado, Apdo. 155, Las Rozas, 28230 Madrid, and Departmento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
*
a)Author to whom correspondence should be addressed.
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Abstract

A microstructural characterization of the La2−xSrxNiO4+δ (0 ⋚ x ⋚ 1) system, prepared with accurate control of the oxygen content, has been performed. The electron diffraction study shows the evolution of the accommodation of compositional variations as a function of δ. For δ > 0.06, interstitial oxygens are ordered, leading to new K2NiF4 superstructural types. Samples with δ < 0.06 accommodate the nonstoichiometry by means of random distribution of anionic vacancies.

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Type
Articles
Information
Journal of Materials Research , Volume 9 , Issue 5 , May 1994, pp. 1263 - 1271
Copyright
Copyright © Materials Research Society 1994

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References

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