CALORIMETRIC MEASUREMENTS OF Ga-Li SYSTEM BY DIRECT REACTION METHOD

The direct reaction calorimetric method was used for the determination of the formation enthalpy of alloys which concentrations correspond to the: Ga7Li2, Ga9Li5, GaLi, Ga4Li5, Ga2Li3, and GaLi2 intermetallic phases. The obtained experimental values of the formation enthalpy were: -18.1 +/- 0.8 kJ/mol at., -26.5 +/- 0.3 kJ/mol at., -34.7 +/- 0.3 kJ/mol at., - 33.5 +/- 0.5 kJ/mol at., -32.8 +/- 0.3 kJ/mol at. and -24.6 +/- 1.4 kJ/mol at., respectively. After the calorimetric measurements, all the samples were checked by way of X-ray diffraction investigations to confirm the structure of the measured alloys. All the measured values of the formation enthalpy of the Ga-Li alloys were compared with literature data and the data calculated with use of the Miedema model.