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Which of the following defects decrease the density?
(i) Interstitial defect
(ii) Vacancy defect
(iii) Frankel defect
(iv) Schottky defect
Answers (1)
The answer is the option (ii, iv) Vacancy and Schottky defect lead to decrease the density. In Vacancy defect, an atom goes missing from one of the lattice site thus decreasing the density. In Schottky defect, an atom moves from inside of crystal to its surface. The density remains the same in case of Frenkel defect and interstitial defect.
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