Mössbauer Characteristics of the Nonstoichiometric Sr2LaFe3O8+δ Perovskite Obtained by Electrochemical Oxidation A. Wattiaux, L. Fournès, F. Zhou, J.C. Grenier, M. Pouchard et J. Etourneau J. Phys. IV France, 07 C1 (1997) C1-351-C1-352 DOI: 10.1051/jp4:19971142