Binding force including ionic interactions and bulk properties for tetrahedral compounds

Results of calculation of bulk properties of the cohesive energy and bulk modulus for InP, ZnTe, CdTe and other compounds are presented. The numerical data using five models for the electronic screening function and two parameters for the model pseudopotential of some compounds are given and compared with the observed data. The obtained contributions of the partially ionic binding to the total crystal energy are very small, and bring an appreciable increase of the bulk modulus in comparison with those considering only the covalent contributions