Two‐Phase (γ,α) Equation of State for Cerium and Features of its Dynamic Compression

The unusual thermodynamic properties of cerium result from features in the narrow 4f‐zone whose electrons are subdivided into localized and delocalized subsystems. In this paper the model of pseudo‐binary solid solutions allowing for two different electronic states is applied to construct the thermodynamically complete two‐phase equation of state for cerium. The parameters of the model were fitted to describe the thermodynamic data obtained in the static experiments with high‐purity cerium. This equation of state was used to analyze wave structures realized under dynamic compression with regard to the equilibrium (γ,α) phase transition.