The Structural and optical properties of ternary II-VI ternary alloys are calculated. The properties are calculated by merging the Epm with Harrison bond orbital model. The approximates of elastic constants are calculated following the empirical pseudopotential method. Elastic constants are calculated by relating with the Harrison bond orbital model. The refrective index, static and high frequency dielectric constants are reported to reveal optical behavior of alloys. The refractive indices (n) are determined from moss formula, which is related to ε∞ to ε0. The properties of the material based on the Zn: Zn S Te were calculated. The Concept of pseudopotentials was introduced by Fermi to study high lying atomic states. Pseudopotential be used for calculating the energy levels of the alkali metals. Alloying effects are considered through modified virtual crystal approximation. Calculations are performed for semiconducting alloys ZnSXTe1-X (0 < x < 1).