The formation enthalpy of the beta Li2Zn3, beta Li2Zn5 and beta LiZn4 intermetallic phases and the integral enthalpy of mixing of liquid Li-Zn alloys were measured with the use of two calorimetric techniques. The direct reaction calorimetric method was used for the determination of the formation enthalpy of the beta Li2Zn3, beta Li2Zn5 and beta LiZn4 intermetallic phases, and the obtained values equal: -16.7 +/- 0.5 kJ/mol at., -19.0 +/- 0.6 kJ/mol at., and -14.2 +/- 0.6 kJ/mol at., respectively. The integral molar enthalpies of mixing for the Li-Zn liquid alloys were determined by means of drop calorimetry in three separate series at 814 K. The obtained experimental values are negative in the entire range of concentrations. The minimum of the integral enthalpy of mixing was observed for 0.3790 mole fraction of lithium and it equals -12.3 kJ/mol Based on the data of this study and those available in the literature, the interaction parameters of the Redlich-Kister equation for the liquid Li-Zn phase were calculated by the least square method. (C) 2016 Elsevier Ltd. All rights reserved.