Synthesis, structures and phase transitions in the double perovskites Sr2-xCaxCrNbO6

Melina C.L. Cheah, Brendan J. Kennedy*, Ray L. Withers, Masao Yonemura, Takashi Kamiyama

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    11 Citations (Scopus)


    The synthesis and crystal structures of nine members of the rock-salt ordered double perovskites Sr2-xCaxCrNbO6 is presented. The crystal structures of the end members of the series Sr2CrNbO6 and Ca2CrNbO6 were refined using powder neutron diffraction data and are cubic in Fm over(3, -) m and monoclinic in P21/n, respectively, in both cases there being considerable anti-site Cr-Nb mixing. Variable temperature and/or composition studies suggest a direct first-order P21/n to Fm over(3, -) m transition, a suggestion supported by selected area electron diffraction studies. Crown

    Original languageEnglish
    Pages (from-to)2487-2494
    Number of pages8
    JournalJournal of Solid State Chemistry
    Issue number8
    Publication statusPublished - Aug 2006


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