Question

In a solid lattice, the cation has left a lattice site and is located at an interstitial position. The lattice defect is ______.

Options

• Frenkel defect

• Schottky defect

• Non-stoichiometric defect

• Valence defect

Answer 1

In a solid lattice, the cation has left a lattice site and is located at an interstitial position. The lattice defect is Frenkel defect.

Explanation:

When a cation leaves its normal lattice site and occupies an interstitial site within the same crystal, it is called a Frenkel defect. It creates a vacancy at the original site and an interstitial defect at the new position. Common in crystals with small cations and large anions, such as AgCl and ZnS.