An equation of state applied to sodium chloride and caesium chloride at high pressures and high temperatures

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Abstract
In the present paper, an equation of state is proposed which has been found to be applicable at high pressures and high temperatures. The proposed equation of state has been used to compute the pressure-volume behaviour, the isothermal bulk modulus and its pressure derivative, the coefficient of thermal expansion and the Anderson-Gruneisen parameter of NaCl and CsCl at high pressures (up to 400 kbar) and high temperatures (up to 1073 K). The results obtained for V(P,T)/V(0,T) are found to be in very good agreement with Decker's data in the whole ranges of pressure and temperature. Further, the other calculated results are also found to be in good agreement with the experimental data. The present calculations definitely lend support to the proposed equation of state and to the method used to extend the applicability at higher temperatures.