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Title: A sequence of transformations related to the formation of M{sub 3}X{sub 2}-type superstructures

A symmetry analysis of monoclinic, orthorhombic, and trigonal M{sub 3}X{sub 2}-type superstructures that can be formed in strongly stoichiometric MX{sub y} compounds with B1 structure is carried out. Channels of order-disorder transitions MX{sub y} → M{sub 3}X{sub 2} are determined. It is shown that, as temperature decreases, two physically admissible sequences of transformations associated with the formation of M{sub 3}X{sub 2} superstructures are possible in nonstoichiometric MX{sub y} compounds of group IV transition metals. By an example of vanadium carbide VC{sub y}, it is demonstrated that orthorhombic or monoclinic V{sub 3}C{sub 2} superstructures can be obtained with the formation of a nanostructure.
Authors:
 [1]
  1. Russian Academy of Sciences, Institute of Solid State Chemistry, Ural Branch (Russian Federation)
Publication Date:
OSTI Identifier:
22472435
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Experimental and Theoretical Physics; Journal Volume: 120; Journal Issue: 1; Other Information: Copyright (c) 2015 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; MONOCLINIC LATTICES; NANOSTRUCTURES; ORDER-DISORDER TRANSFORMATIONS; ORTHORHOMBIC LATTICES; SYMMETRY; TEMPERATURE DEPENDENCE; TRIGONAL LATTICES; VANADIUM CARBIDES; YTTRIUM COMPOUNDS