Question

What type of stoichiometric defect is shown by $ZnS$?

• A. Schottky defect
• B. Frenkel defect
• C. Both Frenkel and Schottky defect
• D. Non-stoichiometric defect

Answer 1

Answer: (B)

Frenkel defect

The defect arises when some of the ions of the lattice occupy interstitial sites leaving lattice sites vacant is known as Frenkel defect.

This defect is generally found in ionic crystals where anion is much larger in size than the cation.

The atomic sizes of $Zn$ and $S$ are different. So, we can say that they show Frenkel defect.

Hence, Option "B" is the correct answer.