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In an ionic solid of the form A+ B-, if an equal quantity of positive and negative ions are absent from their lattice positions while maintaining charge balance, what is the name of this defect?

1. Equal numbers of cations and anions are missing from their lattice sites in the crystal.
2. The defect ensures that the electrical neutrality of the crystal is preserved.
3. This type of defect is referred to as a Schottky defect.
4. None of these statements are accurate.

Correct answer: This type of defect is referred to as a Schottky defect.

Solution

The defect described, where equal numbers of cations and anions are missing while maintaining electrical neutrality, is indeed called a Schottky defect.

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