Alkali halides do not show dislocation defect | vedclass

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Question

(B) Dislocation defect (Frenkel defect) occurs in ionic crystals where there is a large difference in the size of the ions,allowing the smaller ion (u

Vedclass · Accepted Answer

cations and anions have almost equal size

Vedclass · Answer

(B) Dislocation defect (Frenkel defect) occurs in ionic crystals where there is a large difference in the size of the ions,allowing the smaller ion (usually the cation) to occupy an interstitial site. In alkali halides,the sizes of the cations and anions are almost equal,which prevents the smaller ion from fitting into the interstitial spaces. Therefore,they do not show dislocation defect.

Alkali halides do not show dislocation defect because

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