Question

Give two differences between Schottky and Frenkel defects in ionic solids.

Answer 1

Schottky Defect:

$1.$ It occurs when oppositely charged atoms leave their corresponding lattice sites and create a pair of vacancy defect.

$2.$ Size of the anion is almost the same as the size of the colour.

Frenkel Defect:

$1.$ It is one type of point defect where an ion, especially cation leaves it's original lattice site and occupies an interstitial position at the same crystal.

$2.$ Size of the anion is substantially large than the size of a cation.