Question

What is the common example in frenkel and schottkey defect?

Answer 1

Schottky Defect

1. Equal number of cations and anions are missing from the lattice sites.

2. Found in highly ionic compounds with high coordination numbers and where the cations and anions are of similar size.

3. Density of the solid decreases

Frenkel Defect

1. A cation leaves the normal lattice site and occupies an interstitial site.

2. Found in ionic compounds with low coordination numbers and where the anions are much larger in size than cations.

3. Density of the solid remains the same.

Answer 2

AgBr shows both Frenkel and Schottky defects because the radius ratio for AgBr is intermediate.

hope it helps..