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Question
Write a note on Frenkel defect.
Solution
Frenkel defect arises due to the dislocation of ions from its crystal lattice. The ion which is missing from the lattice point occupies an interstitial position. This defect is shown by ionic solids in which cation and anion differ in size.
Unlike Schottky defect, this defect does not affect the density of the crystal. For example AgBr, in this case, a small Ag+ ion leaves its normal site and occupies an interstitial position as shown in the figure.
Frenkel Defect
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RELATED QUESTIONS
Schottky defect in a crystal is observed when
The cation leaves its normal position in the crystal and moves to some interstitial position, the defect in the crystal is known as ____________.
Assertion: due to Frenkel defect, density of the crystalline solid decreases.
Reason: in Frenkel defect cation and anion leaves the crystal.
The crystal with a metal deficiency defect is ____________.
What are point defects?
Explain Schottky defect.
Write short note on metal excess and metal deficiency defect with an example.
