Question

what are two types of stoichiometric defect ?
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Answer 1

Answer:

Types of stoichiometric defects:

Vacancy Defects.

Interstitial defects.

Frenkel Defects.

Schottky Defects.

Explanation:

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Answer 2

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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.