Thermodynamic evaluation of phase equilibria in MCl3-MF3-MgCl2-MgF2 systems where M = La, Nd, Ce

The phase diagrams of the MCl3-MF3-MgCl2-MgF2 (where M = La, Nd, Ce) reciprocal ternary systems have been calculated thermodynamically from available data on the common-ion binary sub-systems and from available data on the MCl3-MgF2 joins. These joins are quasi-binary and divide each system into two quasi-ternary systems: the MCl3-MgF2-MF3 system with a ternary eutectic and the MCl3-MgF2-MgCl2 system also with a ternary eutectic.