Thermodynamic properties of liquid germanium–yttrium alloys

Partial enthalpy of mixing of yttrium (Δmiximage) in the Ge–Y system was measured at 1770 K using a new high-temperature mixing calorimeter. Literature data on the enthalpies of mixing in the Ge–Y system and results of present examination were compared and discussed. Temperature dependence of Δmiximage was estimated based on comparative analysis of the enthalpies of mixing, and corresponding heat capacity change at alloy formation was evaluated. Polynomial equations approximating thermodynamic functions (Δmiximage, ΔmixH, Δmiximage, and ΔmixCp) versus yttrium mole fraction were determined. Some trends observed in the thermodynamic properties of the Ge–Y alloys were described.