Thermochemical investigation of Sm–Mg alloys

The paper focuses on the thermochemical behaviour of the binary Sm–Mg alloys. The enthalpies of formation of the Sm–Mg intermetallic compounds have been determined at 300 K by high temperature direct synthesis calorimetry. The following results in kJ/mole of atoms are reported: −18.5±2 (SmMg), −16.0±2 (SmMg2), −12.0±2 (SmMg3), −8.5±2 (SmMg5) and −5.5±2 (Sm5Mg41). The results are compared with the earlier experimental value obtained by vapour pressure.