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Synthesis, structures and phase transitions in the double perovskites Sr 2- x Ca x CrNbO 6

Cheah, Melina C L; Kennedy, Brendan James; Withers, Raymond; Yonemura, Masao; Kamiyama, Takashi


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...[Show more]

CollectionsANU Research Publications
Date published: 2006
Type: Journal article
Source: Journal of Solid State Chemistry
DOI: 10.1016/j.jssc.2006.04.047


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