Cohesive Energies and other Properties of Ionic Crystals—I. Alkali Halides

The lattice energies and other properties of ionic crystals have been studied on the basis of a Lennard-Jones (12 : 6) potential form and the necessary equations derived. Experimental data for the inter ionic distances and lattice energies for such crystal have been used to give the values of the repulsive force parameter B and the van der Waals Parameter C, which in turn have been utilized to obtain lattice energies, compress abilities and the coefficient of linear expansion. Satisfactory agreement is found between the experimental values and those calculated theoretically