Evaluation of the strain derivatives of electronic polarizabilities and dielectric constants of alkaline earth fluorides

A method recently developed for explaining the photoelastic behavior of alkali halides has been applied to evaluate the strain derivatives of electronic polarizabilities and dielectric constants of alkaline earth fluorides. The calculated values of the strain derivative of electronic polarizabilities present a reasonable agreement with experimental data. Values of the strain derivative of the electronic dielectric constants for CaF2, SrF2, and BaF2 calculated in the present study within the framework of Clausius–Mossotti theory are in agreement with the corresponding experimental values. The sensitivity of the results on the electronic polarizabilities of ions has been discussed.