Thermodynamic Properties of Liquid Antimony-Thallium and Bismuth-Thallium Alloys

The values of E.M.F. of the following cells for liquid antimony-thallium and bismuth-thallium systems have been measured for NTl=0.10∼0.90 over the temperature ranges from 953 to 1230 K and 667 to 1183 K, respectively:(This article is not displayable. Please see full text pdf.) \ oindentThe values of E.M.F. obtained for both systems showed a good stability and linear relationships with temperature.The activities of both components in these systems demonstrate negative deviations from Raoult’s law over the whole concentration ranges. The activities of both components for the bismuth-thallium system exhibit slightly greater negative deviations than those for the antimony-thallium system, suggesting the moderately larger affinity of thallium for bismuth than that for antimony.The α function of thallium for both systems show the curves against NTl, suggesting that these alloys are not considered as regular solutions in either case.The maximum values of the heat of mixing are −3.35 kJ/mol for the antimony-thallium system at about NTl=0.65 and −4.69 kJ/mol for the bismuth-thallium system at about NTl=0.61.In addition, other thermodynamic functions were calculated on the basis of the results obtained.