Abstract
A symmetry analysis of trigonal, cubic, and tetragonal superstructures of the M 2 X type that are formed in strongly nonstoichiometric compounds MX y with the B1 structure has been performed. The channels of disorder-order transitions MX y → M 2 X have been determined. It has been demonstrated that, in nonstoichiometric carbides and nitrides MX y of Group IV transition metals, a decrease in the temperature can lead to three physically allowable sequences of transformations associated with the formation of M 2 X ordered phases.
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Original Russian Text © A.I. Gusev, 2010, published in Fizika Tverdogo Tela, 2010, Vol. 52, No. 9, pp. 1804–1808.
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Gusev, A.I. Ordering of MX y nonstoichiometric compounds with the formation of M 2 X superstructures. Phys. Solid State 52, 1935–1940 (2010). https://doi.org/10.1134/S1063783410090258
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DOI: https://doi.org/10.1134/S1063783410090258