Phase transitions between NiAs- and MnP-type phases

H. F. Franzen, C. Haas, and F. Jellinek

Phys. Rev. B 10, 1248 – Published 15 August 1974

 

Abstract

The Landau theory of phase transitions is applied to the case of a transition from D46h symmetry to D162h symmetry. The restraints placed upon various thermodynamic quantities by the symmetry change are reported. It is shown that the MnP-type structure (space group D162h) and the low-temperature form of NbS (space group C46ν) are related distortions, as both correspond to the same irreducible representation M−4 of the NiAs-type structure (space group D46h).

• Received 18 March 1974

DOI:https://doi.org/10.1103/PhysRevB.10.1248

©1974 American Physical Society

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