Question

Which kind of defect is shown by the given crystal?
$K^{+}$ ${Cl}^{-}$ $K^{+}$ ${Cl}^{-}$ $K^{+}$ ${Cl}^{-}$
${Cl}^{-}$ $\square$ ${Cl}^{-}$ $K^{+}$ $\square$ $K^{+}$
$K^{+}$ ${Cl}^{-}$ $\square$ ${Cl}^{-}$ $K^{+}$ ${Cl}^{-}$
${Cl}^{-}$ $K^{+}$ ${Cl}^{-}$ $K^{+}$ $\square$ $K^{+}$

• A. Schottky defect
• B. Frenkel defect
• C. Schottky Frenkel defects
• D. Substitution disorder

Answer 1

The correct option is A Schottky defect

In the given crystal equal number of cations and anions are missing (two $K^{+}$ and two ${Cl}^{-}$) from their normal lattice sites and the crystal maintains electrical neutrality. Hence, this is Schottky defect.