The intrinsic carrier concentrations, Fermi energies, and the electron effective masses are calculated for Hg1−xZnxTe with 0<x⩽0.4 and 50 K⩽T⩽400 K. The numerical calculations are based on the Kanek⋅pmodel and no further analytical simplification or approximation is made for the energy band structure beyond those inherent in the Kane model. The results are compared to the previous calculations. ©1997 American Institute of Physics.