Question

Ionic lattice has two major points defects, (1) Schottky (2) Frenkel defects. Schottky defects occur due to the cation-anion pair's missing from the lattice sites. Frenkel defects occur when an ion leaves its lattice site and fits into interstitial space. The neutrality of the crystal is being maintained and we considered all losses from interstitial positions.

The structure is shown here represents :

• A. Schottky defect
• B. Frenkel defect
• C. Metal excess defect
• D. None of the above

Answer 1

Answer: (C)

Metal excess defect

Here, one extra metal is present in structure. So, the structure in the figure has Metal excess defect.