Explanation:
Frenkel defect is generally found in ionic crystals where anion is much larger in size than the cation. It is also known as dislocation defect.Frenkel defect is present in \(\mathrm{AgBr}\). This defect arises when the smaller ion (usually cation) is dislocated from its normal site. It creates a vacancy defect at its original site and an interstitial defect at its new location.
\(e.g.\) \({\rm{AgBr,}}\,{\rm{AgCl,}}\,{\rm{AgI,}}\,{\rm{ZnS}}{\rm{.}}\)