Abstract
New Zn2P2O7, K2ZnP2O7 and KZn1.5P2O7 compounds were synthesized with conventional solid solid reaction method. The optical properties have been studied by using UV-Visible spectrophotometer. The optical band gaps (Eg) were found to be 3.76 eV, 3.39 eV and 3.59 eV respectively. Optical parameters such as refractive index, Cauchy's parameters and conductivity were deduced. The refractive index fitting in the visible range and the dispersion parameters (E-0 and E-d) of these compounds were estimated using the Wemple-DiDomenico model.