Analysis of melting based on the diffusional force theory for alkali halides Original Research Article

The theory of melting based on the concept of diffusional force given by Bosi is used for studying the melting of alkali halides. Values of thermal expansivity and the Anderson–Gruneisen parameter are used to predict the interionic separations in 16 alkali halides at melting temperatures with the help of the Anderson formula. A model for melting is developed by estimating the diffusional force from the knowledge of interionic potentials based on ultrasonic data for bulk modulus and its temperature and pressure derivatives. The model thus developed is found to yield satisfactory results in agreement with the experimental data on melting.