In situ neutron diffraction study (300-1273 K) of non-stoichiometric strontium ferrite SrFeOx

M. Schmidt*, S. J. Campbell

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    45 Citations (Scopus)

    Abstract

    The high-temperature cubic phase of non-stoichiometric strontium ferrite SrFeOx (2.5 ≤ x ≤ 3.0) has been studied by in situ neutron powder diffraction in air over the temperature range 300-1273 K. The composition of SrFeOx changes within the range 2.56 ≤ x ≤ 2.81 from 1273 to 673 K, respectively. Rietveld refinements of the diffraction patterns show that the high-temperature cubic phase of SrFeOx is consistent with a face-centred Fm3c structure. This structure leads to agreement with previous density measurements. This cell allows the high-temperature structure of SrFeOx to be described in terms of a solid solution of the composition end members. Cubic SrFeOx at high temperature is found to closely obey Vegard's law. The density of cubic SrFeOx is also found to exhibit a linear relationship with composition.

    Original languageEnglish
    Pages (from-to)2085-2092
    Number of pages8
    JournalJournal of Physics and Chemistry of Solids
    Volume63
    Issue number11
    DOIs
    Publication statusPublished - Nov 2002

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