On the theory of electrostriction in finite ionic crystals: non-piezoelectric case

Abstract

Equations are obtained for determining the temperature independent electrostrictive coefficients of a finite non-piezoelectric ionic crystal composed of point charges on an arbitrary basis. The derivation is based on the assumption that the relaxation of the interionic spacing at the surface of the crystal extends only over a few layers of ions. The special case of a diatomic crystal with NaCl structure and nonpolarizable ions is discussed and the results used to calculate the electrostrictive coefficients of NaCl, KCl, and KBr.