Phase diagram of the ternary Ni-Sb-Zn system was investigated experimentally by DSC and SEM-EDS methods and theoretically by the CALPHAD method. The liquidus projection, invariant equilibria, several vertical sections and isothermal sections at 600 degrees C and 25 degrees C were predicted using COST MP0602 thermodynamic database. Phase transition temperatures of alloys along three predicted vertical sections of the Ni-Sb-Zn ternary system with molar ratio x(Ni):x(Zn) = 1, x(Ni):x(Sb) = 1 and x(Ni) = 0.2, were measured by differential scanning calorimetry (DSC). Predicted isothermal sections at 600 degrees C and 25 degrees C were compared with the results of the scanning electron microscope (SEM) with energy dispersive spectrometry (EDS) analysis from this work. (C) 2011 Elsevier B.V. All rights reserved.