We recently proposed an isothermal equation of state that was successfully applied to study the high-pressure behavior of solids. Later, we developed a simple model to include temperature effects on the equation of state. In the present work we consider the prediction capabilities of the complete equation of state in the entire p-V-T surface of a solid. Our predictions have been compared with experimental data up to pressures of several GPa and temperatures between zero and temperatures rather higher than those of melting. We also compare the performance of our equation against the most successful equations of state proposed in the literature, with excellent results. The isothermal equation of state provides us an adequate representation of experimental pressure-volume data and a simple volume dependence for the Grüneisen parameter. The equation needs only four parameters evaluated at room pressure at a single reference temperature. © 1996 The American Physical Society.

• Received 12 March 1996

DOI:https://doi.org/10.1103/PhysRevB.54.7034