Chemistry Question on The solid state

Question

In which among the following solids, Schottky defect is NOT observed?

Answer 1

Solution

Schottky defect is shown by those compounds in which the cations and anions are of almost similar sizes. Therefore, $CsCl , KCl$ and $NaCl$ will show schottky defect while ZnS will not show this defect due to large difference in size of anion and cation

Note ZnS will show Frenkel defect