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Thermodynamic Investigation of the Gold-Rich Au-Sb Eutectic Alloy

The heat content of the solid and liquid Au-Sb gold-rich eutectic alloy was measured from 298K to T (461-846K) on heating (drop method) with the help of a Tian-Calvet calorimeter. The heat capacity of the eutectic alloy in the solid and liquid states as well as its enthalpy of fusion were deduced. There is no structural change on melting since the experimental entropy of fusion agrees well with that calculated from additivity of the phases in equilibrium.