Equations of state for CaSiO3phases based on the Helmholtz free energy

Abstract

Equations of state for the CaSiO3 phases are constructed using a thermodynamic model based on the Helmholtz free energy. The proposed thermodynamic formalism is allowed us to calculate the full set of thermodynamic properties of minerals in a wide range of temperatures and pressures. The proposed equations of state are constructed with a small number of fitting parameters and reliably represent the properties of studied minerals under T-P or T-V parameters.