The rotator phase of solid caesium cyanide

Abstract
Molecular dynamics calculations are reported for the orientationally disordered phase of soid CsCN. Results are given for time correlation functions appropriate to polarised Raman and coherent inelastic neutron scattering. The models are shown to reproduce the anomalously low frequencies recently measured for transverse acoustic phonons. The calculated properties of the caesium salt are compared with those of disordered cyanide crystals having the sodium chloride structure.