Structure and oxygen stoichiometry in Sr3Fe2O7-y, 0 ≤ y ≤ 1.0

S. E. Dann, M. T. Weller, D. B. Currie

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Powder neutron diffraction has been used to determine the structure of four compounds from the series SrFeO, y = 0, 0.25, 0.42, and 1.0. All these compounds crystallize with structures based on that of SrTiO with oxygen systematically removed from a site linking the FeO octahedra together. Complete removal of oxygen from this site produces an unusual, square-pyramidal coordination around each iron(III) ion and a stoichiometry of SrFeO; this compound is isostructural with LaSrCuO. A bond valence parameter, R, for Fe has been derived as 1.788(2) Å.
Original languageEnglish
Pages (from-to)179-185
JournalJournal of Solid State Chemistry
Issue number1
Publication statusPublished - 1 Mar 1992

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Copyright 2008 Elsevier B.V., All rights reserved.


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