On the structural dynamics of plastically crystalline alkali hydroxides
- 23 November 1992
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 4 (47) , 9283-9298
- https://doi.org/10.1088/0953-8984/4/47/010
Abstract
In their high-temperature cubic phase the alkali hydroxides NaOH and KOH and the corresponding deuterated compounds are described by an elastic dipole model for the reorienting OH- groups. The theory describes thermo-diffuse scattering, Huang scattering and phonon softening. The inelastic data and the dispersions of the acoustic modes of KOD are shown and interpreted. Similarities to cooperative Jahn-Teller compounds and alkali cyanides are discussed.Keywords
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