Question

what are two types of stoichiometric defect ?​

Answer 1

Answer:

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Stoichiometric defects

Vacancy :- when constituents particle missing, then vacancy defects occurs.

Frenkel :- the defect in which an ion is displaced from its regular position creating a vacancy. Such type of defects is called frenkel defects Or dislocation defect.

Schottky :- Detect in which pair of one cation and one anion of equal valence is missing from an ionic crystal leading to a pair of vacant sites. Such type of defects is known as schottky defect.

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Non - stoichiometric defects:-

Metal excess defect:- The defects occurs due to anionic vacancies or due to the presence of extra cations at the interstitial site.

Metal deficiency defect :- The defect occurs due to absence of positive ions from lattice site or extra interstitial negative ions.

Answer 2

Answer:

Defects caused in such solids without changing its stoichiometry are called stoichiometric defects. -There are two types of stoichiometric defects. One is schottky defect and the other is frenkel. Schottky defect occurs when equal numbers of cations and anions are missing from the lattice.

Explanation: