Crystal Dynamics of Cesium Iodide

Abstract

Abstract Frequencies of the normal modes of vibration of cesium iodide at room temperature propagating in certain symmetry directions were determined by means of slow‐neutron inelastic scattering using a triple axis spectrometer. The data are in reasonable agreement with thermal diffuse X‐ray scattering investigations of Eldridge [1]. The shell model was fitted to the frequencies with good results. This 14‐parameter model was used to compute a frequency distribution and related thermodynamic data.