Phase diagram and thermodynamics of the La2O3–Ga2O3 system revisited

Previous thermodynamic description of the La2O3–Ga2O3 system has been updated based on new experimental data on the liquidus and the enthalpies of formation of LaGaO3 and La4Ga2O9 measured by high-temperature oxide melt drop solution calorimetry as well as calculated from first-principles. The existing contradictions were successfully resolved. Both the phase diagram and thermodynamic data were reproduced with high accuracy by thermodynamic calculations using the CALPHAD method.