Computer simulation study of the structural properties of molten caesium halides

Molecular dynamics simulations of molten caesium halides based on polarisable ion interionic potentials which are derived from solid state data are presented. The most interesting feature of the partial radial distribution functions is the emergence of a subsidiary peak in the like-particle functions for CsCl, CsBr and CsI. It is argued that this structure is due to ion-size effects and, although related to the differences found in the stable crystal structures, does not arise from this directly.