Question

explain schottky defect , frenkel defect with suitable example​

Answer 1

Explanation:

Schottky defect is a type of point defect or imperfection in solids which is caused by a vacant position that is generated in a crystal lattice due to the atoms or ions moving out from the interior to the surface of the crystal.

Example, NaCl, KCl, CsCl and AgBr

A A Frenkel defect is a type of point defect in crystalline solids named after its discoverer Yakov Frenkel. The defect forms when an atom or smaller ion leaves its place in the lattice, creating a vacancy, and becomes an interstitial by lodging in a nearby location is a type of point defect in crystalline solids named after its discoverer Yakov Frenkel. The defect forms when an atom or smaller ion leaves its place in the lattice, creating a vacancy, and becomes an interstitial by lodging in a nearby location.

Example - AgBr, ZnS, AgCl, and AgI.

Answer 2

Answer:

In Schottky defect the difference in size between cation and anion is small. Frenkel defect contains ionic crystals where the anion is larger than the cation. ... Usually the smaller ion cation leaves its original lattice structure. Atoms permanently leave the crystal.(i) Schottky defect. Some atoms or ions are missing from their normal lattice sites. Unoccupied lattice sites are called vacancies or holes. For example, in the crystal lattice of NaCl, equal number of cations and anions are missing to maintain electrical neutrality. (ii) Frenkel defect.