Thermodynamic investigations in the solid state of the lanthanum–magnesium–zinc system

The La–Mg–Zn phase diagram is experimentally investigated at 595 K, xLa > 4% and the corresponding isothermal section is partially determined. This section includes 5 substitutional solid solutions based on the binary compounds (LaMg, LaZn, LaMg3, LaMg10.3 and La2Zn17) and three ternary phase (La8(Mg,Zn)92, La3(Mg,Zn)11 and La4.27Mg2.89Zn30). The enthalpies of mixing in the ternary solid solutions are calculated at 298 K on the basis of tin solution calorimetry experiments.