11.—The Symmetry of Atomic Vibrations in KH2PO4

1 January 1972

journal article
research article
Published by Cambridge University Press (CUP) in Proceedings of the Royal Society of Edinburgh: Section A Mathematics

Vol. 70, 107-124
https://doi.org/10.1017/s0080454100008955

Abstract

The space group for paraelectric KH2PO4 is described and tables of irreducible representations are presented. These are used to derive the symmetry of the vibrational modes for both the heavy atoms and the hydrogen atoms, the latter being treated by a simple pseudo-spin model. Recent experiments on KH2PO4 and related materials are analysed in terms of the mode symmetries, and the light these experiments throw upon the nature of the phase transitions is briefly discussed.

Keywords

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