Structural disorder in AgBr on the approach to melting
- 26 March 1990
- journal article
- Published by IOP Publishing in Journal of Physics: Condensed Matter
- Vol. 2 (12), 2773-2786
- https://doi.org/10.1088/0953-8984/2/12/002
Abstract
The powder neutron diffraction pattern of AgBr has been measured at nine temperatures between 293 K and 703 K (melting point Tm=701 K). The structure factors have been analysed using the reverse Monte Carlo modelling technique to produce three-dimensional distributions of ions which show the thermally induced structural disorder in AgBr. Anisotropic mean squared displacements about lattice sites and occupancy of interstitial (1/4, 1/4, 1/4) sites by Ag+ ions have been calculated for each temperature, giving a quantitative description of the development of the structural disorder associated with premelting.Keywords
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