Thermodynamic calculations have been done on cerium fluoride in the LiF-CaF2 eutectics from 1113 to 1233K with FactSage and HSC 6.1 database. From electrochemical measurements (linear sweep voltammetry, equilibrium potential measurements…), the main thermodynamic properties needed for the electrochemical separation evaluation were determined: standard potentials and activity coefficients in different reference states (liquid or solid reference state, and infinite dilution reference state) and for different composition scales (molarity, molality, or molar fraction), and also standard enthalpy and standard entropy of formation in the 1113-1233K temperature range.
Finally, constants which interconnected the infinite dilution reference state and the solid and liquid reference states were evaluated.