Results of the comparative thermodynamic analysis of the Bi-Ga0.1Sb0.9 section in theBi-Ga-Sb system are given in this paper. Experimental calorimetric investigations were done according to Oelsen's
method, while for the thermodynamic prediction Chou's general solution model was applied. Activities, activity coefficients,
partial molar quantities for bismuth and integral molar quantities were obtained at a temperature of 1073 K. Based on obtained
cooling curves, DTA and SEM results for the investigated samples, phase diagram of the investigated section is constructed
and presented in this paper, too.