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In which type of point defect are the cations and anions absent in stoichiometric proportions?

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in Chemistry – Class 12 by (188k points)
In which type of point defect are the cations and anions absent in stoichiometric proportions?

(a) Schottky defect

(b) Frenkel defect

(c) Impurity defect

(d) The given situation does not occur for any point defect.

The question was posed to me by my school principal while I was bunking the class.

The question is from Imperfections in Solids in division Solid State of Chemistry – Class 12

1 Answer

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Best answer
Correct choice is (a) Schottky defect

Easy explanation: A vacancy defect is when an atom, ion or molecule is absent from its position in the lattice. When this occurs for ionic solids, it is called a Schottky defect. Cations and anions are found to be absent in stoichiometric proportion so that the electrical neutrality of the crystal is maintained.

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