Question

Difference between schottky defect and frenkel defect 2

Answer 1

One Frenkel defect creates one vacancy and one self-interstitialdefect. Two atoms reduce from the crystal for each Schottky defect. The number of atoms present in the crystal before and after Frenkel defectremains same. Due to vacancy formation, Schottky defect reduces density of the solid.

Answer 2

Answer:

Schottky Defect:

1. Equal number of cation and anions are missing from their  normal crystal sites in a whole ratio.

2. It lowers the density of solid.

3. Ionic compounds having high C.N. and Comparable radii of cation and anion show this defect.

Frenkel Defect:

1. Some atoms or ions are displaced or dislocated from their sites.

2. No effect on density of solid.

3. Ionic compounds with low C.N. and a large difference  in cationic and anionic radii show this defect