Author:
Howard Christopher J.,Kennedy Brendan J.,Woodward Patrick M.
Abstract
Group-theoretical methods are used to enumerate the structures of ordered double perovskites, A
2
BB′X
6, in which the ordering of cations B and B′ into alternate octahedra is considered in combination with the ubiquitous BX
6 (or B′X
6) octahedral tilting. The cation ordering on the B-cation site is described by the irreducible representation R_1^+ of the Pm \overline 3 m space group of the cubic aristotype, while the octahedral tilting is mediated by irreducible representations M_3^+ and R_4^+. There are 12 different structures identified, and the corresponding group–subgroup relationships are displayed. Known structures are briefly reviewed.
Publisher
International Union of Crystallography (IUCr)
Subject
General Biochemistry, Genetics and Molecular Biology,General Medicine
Cited by
484 articles.
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