Multiple choice

The density of the crystal will be decreased in case of

  1. vacancy defect.

  2. schottky defect.

  3. frenkel defect.

  4. interstitial defect.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A schottky defect is a type of point defect in a crystal lattice. This defect occurs when oppositely charged ions leave their lattice sites while creating vacancies. These vacancies are formed in stoichiometric units to maintain an overall neutral charge in the ionic solid. The vacancies are then free to move about as their own entities. Normally these defects lead to a decrease in the density of the crystal.

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