Abstract
A new interionic potential has been used to study the mechanical and thermal properties of ionic crystals. The cohesive energy, the Grüneisen parameter, the Moelwyn-Hughes parameter, the Rao-Keer constant, the infrared absorption frequency and the Debye temperature have been calculated for crystals having sodium chloride and caesium chloride crystal structures under normal pressure. The agreement with experimental values is encouraging. The repulsive component of ionic binding appears to include both the inverse power function of Born and Landé and the exponential function of Born and Mayer.
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