1.

Define point defect. Why is Frenkel defect produced in solid crystal?

Answer»

Point defect:-

The defect in which irregularties from ideal arrangement around a point occur, is called point defect.

The defect arrise when some of the ions of the lattice occupy interstitial sites leaving lattice site vacent is called frenkel defect. This defect occurs in ionic crystal where anion is much larger in size then the cation.

ex. AgBr, ZnS.



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