Q18Multiple choice
Schottky defect is observed in crystals when __________.
- (i)some cations move from their lattice site to interstitial sites.
- (ii)equal number of cations and anions are missing from the lattice.
- (iii)some lattice sites are occupied by electrons.
- (iv)some impurity is present in the lattice.
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(ii) equal number of cations and anions are missing from the lattice.