Study of temperature dependence of interatomic separation and bulk modulus for ionic solids

https://doi.org/10.1016/S0022-3697(97)00164-9Get rights and content

Abstract

A thermodynamic analysis of the Anderson-Gruneisen parameter is found to yield useful relations for estimating the temperature dependence of interatomic separation r(T) and the bulk modulus BT(T). In this paper, the relations for r(T) and BT(T) are developed using the approximation that the Anderson-Gruneisen parameter δT is independent of temperature (T) which is greater than the Debye temperature (θD). These relations can be used to predict (T) and BT(T) up to the melting temperature of eight alkali halide solids. The results are compared with the available experimental data and are discussed in view of recent research in the field of high temperature physics.

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