A Born-model analysis of interatomic forces in alkali halides using ultrasonic data

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Abstract
An analysis of interatomic forces operative in the alkali halides is performed within the framework of the Born model using recent experimental data based on ultrasonic measurements. Several forms of the potential, representing the dependence of short-range repulsive energy on interionic distance, are considered. The van der Waals dipole-dipole and the dipole-quadrupole interactions are taken into account. The Born repulsive parameters are evaluated from the Hildebrand approximation using recently obtained ultrasonic data. The cohesive energies and the Anderson-Grüneisen parameters have been calculated for alkali halides having the NaCl structure and these are compared with experimental data.

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