Untersuchungen zur Anionendefektverteilung in Sr2MnO4-y/ Investigation on the Distribution of Anion Vacancies in Sr2MnO4-y

R. Kriegel 1 , H. Borrmann 2 , A. Simon 2  and A. Feltz 1
  • 1 Jena, Institut für Anorganische und Analytische Chemie der Friedrich-Schiller-Universität, August-Bebel-Straße 2, D-O-6900 Jena
  • 2 Stuttgart, Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-W -7000 Stuttgart 80

At high temperatures Sr2MnO4-y crystallizes in the K2NiF4 structure with anion defects. X -ray structure determination in space group I 4/m m m (No. 139) with a = 380.58(3), c = 1253.19(11) pm reveals the composition Sr2MnO3.84±0.05 for a single crystal prepared under argon at 1510 °C. The oxygen deficiency is restricted to the basal oxygen atoms in the perovskite layer. The X -ray experiment shows a statistical distribution of the defects. They lead to a distorted tetragonal pyramidal coordination of the Mn3+ ions.

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Zeitschrift für Naturforschung B is an international scientific journal which publishes original papers, microreviews, and letters from all areas of inorganic chemistry, solid state chemistry, coordination chemistry, molecular chemistry, and organic chemistry.