Understanding Frenkel Defects

The video tutorial explains the Frenkel defect in ionic crystals, where a cation leaves its lattice site and occupies an interstitial site, creating a vacancy and an interstitial defect. This defect, also known as a dislocation defect, is common in ionic compounds with low coordination numbers. The tutorial highlights that the number of cations and anions remains unchanged, and the density of the crystal is unaffected. The defect increases the dielectric constant of the crystal.

Why is the Frenkel defect also referred to as a dislocation defect?

What types of ionic compounds commonly exhibit Frenkel defects?