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InterviewSolution
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The correct statement regarding defects in crystalling solids.A. Frenkel defect is a dislocation defectB. Frenkel defect is found in halides of alkaline metalsC. Schottky defects have no effect on the density of crystalline solidsD. Frenkel defects decrease the density of crystalline solids. |
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Answer» Correct Answer - 1 Frankel defect is shown by ionic solid in which there is a large different in the size of ions (and hence the coordination number is low).for example `ZnS,AgCl,AgBr` and `Agl` due to small size of `Zn^(2+)` and `Ag^(+)` ions. In defect the smaller ion (usually cation) is dislocated from its normal site to an interstitial site.This creates a vacancy defect at its origin site and are interstitial defect at its new location.Therfore Frenkel defect is also called dislocation defect. it does not change the density of the solid. |
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