Calorimetric investigations of Au-In, In-Sb and Au-In-Sb systems at 973Â K

► Direct reaction calorimetry at 973 K is performed in the Au-In-Sb system. ► Negative interactions in the whole ternary system are observed. ► The minimum in mixing enthalpy belongs to the Au-In system at −18 kJ/mol. ► The section Sb-0.75In0.25Au is nearly ideal.