Schottky defect is observed in a crystal when
(a)Some Cations aremissing from their lattice site an occupy interstitial site
(b) Equal number of cation and anionss are missing from lattice.
(c) Some lattice sites are occupied by electrons.
(d) Some impurity is present in the lattice.
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b) Equal number of cations and anions are missing from lattice, resulting decrease in density.
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