Abstract
A symmetry analysis of monoclinic, orthorhombic, and trigonal M3X2-type superstructures that can be formed in strongly stoichiometric MX y compounds with B1 structure is carried out. Channels of order-disorder transitions MX y → M3X2 are determined. It is shown that, as temperature decreases, two physically admissible sequences of transformations associated with the formation of M3X2 superstructures are possible in nonstoichiometric MX y compounds of group IV transition metals. By an example of vanadium carbide VC y , it is demonstrated that orthorhombic or monoclinic V3C2 superstructures can be obtained with the formation of a nanostructure.
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Original Russian Text © A.I. Gusev, 2015, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2015, Vol. 147, No. 1, pp. 105–111.
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Gusev, A.I. A sequence of transformations related to the formation of M3X2-type superstructures. J. Exp. Theor. Phys. 120, 91–96 (2015). https://doi.org/10.1134/S1063776115010112
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DOI: https://doi.org/10.1134/S1063776115010112