Abstract

The TOEC's elastic characteristics of mixed alkali cyanide-alkali halide crystal (CsCN)x(CsX)1-x (X= Cl) for x=0, 0.28, 0.59, and 0.96 at various temperatures have been examined using an Extended three-body force shell model (ETSM). The effect of coupling between the cyanide molecules' rotational and translational motion is included in this model. Finite elasticity, in which elastic stress is non-linear with elastic strain, is the responsibility of the TOECs. In some crystallographic planes, the elastic shear behaviour is asymmetric with regard to shear displacements. The knowledge of ion-core repulsive interactions; which vary with the interatomic separation; is related to the third order elastic constants.

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