State any three differences between Schottky and Frankel defect?

1.	State any three differences between Schottky and Frankel defect?
Answer» Schottky defect I. It occurs due to missing of equal no of cations and anions from lattice point. II. It decreases the density of the crystal. III. It occurs in compounds with high Co-ordination number. OR It occurs in compounds in which cations and anions are of similar size. Examples: NaCl, KCl, KBr, Ag Br CsCl. Frankel defect I. It occurs due to missing of cations from their lattice point and occupies interstitial sites II. It does not decrease the density of the crystal. III. It occurs in compounds with low Co-ordination number. OR It occurs in compounds in which cations and anions differ in their size to a large extent. Examples: ZnS, AgCl, AgBr, Agl.

Answer»

Schottky defect

I. It occurs due to missing of equal no of cations and anions from lattice point.

II. It decreases the density of the crystal.

III. It occurs in compounds with high Co-ordination number.

It occurs in compounds in which cations and anions are of similar size.

Examples: NaCl, KCl, KBr, Ag Br CsCl.

Frankel defect

I. It occurs due to missing of cations from their lattice point and occupies interstitial sites

II. It does not decrease the density of the crystal.

III. It occurs in compounds with low Co-ordination number.

It occurs in compounds in which cations and anions differ in their size to a large extent.

Examples: ZnS, AgCl, AgBr, Agl.

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