Thermal and elastic properties of sodium chloride at high temperature
S. K. Srivastava and Pallavi Sinha
In the present study, the Anderson-Isaak approximation for volume dependence of the Anderson-Grüneisen parameter is modified with the addition of an assumption regarding the volume dependence of thermoelastic parameter (k). New expressions for volume dependence of δT and thermal expansivity are obtained; those follow the constraints of high pressure thermodynamics in the limit of infinite pressure. The modified expression is used to estimate temperature dependence of elastic moduli for NaCl. A close agreement between theory and experiment reveals the validity of present approach.
Keywords: Anderson-Grüneisen parameter; thermal expansivity; elastic constants