What type of stoichiometric defect is shown by?
(i) ZnS (ii) AgBr
i) ZnS shows Frankel defect
Explanation: Frankel defect arises when an atom or smaller ion leaves its place in the lattice, creating a vacancy and becomes an interstitial by lodging in a nearby location. This occurs in ZnS due to the comparatively smaller size of Zn2+ .
ii) AgBr shows frankel as well as schottky defect.
Explanation: AgBr shows both types of defects, i.e. schottky and Frenkel Defects. Since, Schottky Defects arises because of mission of constituent particles, thus it decreases the density of ionic compound.