Ionic solids, with Schottky defects, contain in their structure:
A
Cation vacancies only
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B
Cation vacancies and interstitial cations
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C
Equal number of cation and anion vacancies
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D
Anion vacancies and interstitial anions
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Solution
The correct option is C Equal number of cation and anion vacancies When an atom is missing from its normal lattice site, a lattice vacancy is created. Such a defect, which involves equal number of cation and anion vacancies in the crystal lattice is called a Schottky defect