The free Gibbs energy, enthalpy, and entropy of formation of silicon-rich holmium silicides HoSi 2–a (HoSi 1.82 ), HoSi 2–b (HoSi 1.67 ), Ho 3 Si 4 , and HoSi from solid components are determined by measuring electromotive forces between 710 and 930 K. The thermodynamic functions of...