Question

Which is the defect represent by the given figure?

• A. Schottky defect
• B. Frenkel defect
• C. Vacancy defect
• D. Interstitial defect

Answer 1

The correct option is B Frenkel defect

In the given figure, a cation is displaced from its position (red circle in the figure) to the interstitial position (green circle in the figure).

This defect forms when an atom or smaller ion (usually cation) leaves its place in the lattice, creating a vacancy, and becomes an interstitial by lodging in a nearby location.

So, it is a Frenkel defect.

Hence, option $B$ is correct.