Lattice properties of alkali halides

From an appropriate form of the interaction potential energy function the values of the cohesive energy, atomization energy, Grüneisen parameter, Anderson-Grüneisen parameter, and pressure and temperature derivatives of elastic constants have been computed for twenty alkali halide crystals. In the present calculation, the contribution of the van der Waals term has been taken into account, but the uncertainty in the values of the van der Waals constant does not hamper the results. The electron affinities of the halogen atoms have also been evaluated. In most cases the agreement between calculated and experimental values is satisfactory.