The polarization caused by the deviation of the electron distribution center of the ion from the atomic nucleus due to the interaction of positive and negative ions. According to the polarization mechanism, it can be divided into ionic relaxation polarization and ion displacement polarization. The polarization of ionic crystal is the electric dipole moment per unit volume. ionic polarization has an important influence on the dielectric constant of crystal and the light absorption and reflection of crystal.
Fundamental of Material Science -> Physical and chemical basis of materials