Question

In a solid lattice, the cation and anion both have left a lattice site. The lattice defect is known as:

• A. interstitial defect
• B. vacancy defect
• C. frenkel defect
• D. schottly defect.

Answer 1

The correct option is D schottly defect.

Schottky Defect: This defect occurs when oppositely charged ions leave their lattice site creating vacancies in such a way that electrical neutrality of crystal is maintained.

It is generally seen in highly ionic compounds where the difference in the size of cation and anion is small.

So, an equal number of cations and anions vacancies are present in the crystals with Schottky Defect.

Hence, the correct option is $\text{D}$