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The ZrCo intermetallic was proposed as tritium storage material in theInternational Thermonuclear Experimental Reactors (ITER) project. Thethermodynamic properties of ZrCo intermetallic were investigated bothexperimentally and theoretically to determine its applicability for the storageof hydrogen isotopes. The enthalpy increments of ZrCo were measured using ahigh temperature inverse drop calorimeter in the temperature range 645-1500 K.A set of thermodynamic functions such as entropy, Gibbs energy function, heatcapacity, Gibbs energy and enthalpy values for ZrCo were calculated using thedata obtained in this study. The polynomial expression of enthalpy incrementsand heat capacity obtained for ZrCo(s) in the temperature range 642-1497 K aregiven as: H(T) - H(298.15 K) (J/mol) = 25.682x(T/K) + 29.804x10e-4 (T/K)**2+2.1864x10e+5 (K/T) - 8655.5 Cp (J/K/mol) =25.682 + 5.916x10e-3 (T/K) -2.1864x10e+5 (K/T)**2 The enthalpy of formation of ZrCo at 0 K was calculatedas -55 kJ mol-1 using the ab-initio method. The entropy (S) and specific heatcapacities (Cv and Cp) of ZrCo were also computed using Debye-Gr\"uneisenquasi-harmonic approximation. A good agreement between the experimental andtheoretically calculated values of specific heat (CP) and entropy was obtained.

High Temperature Enthalpy Increment and Thermodynamic Functions of ZrCo: An Experimental and Theoretical Study