Which of the following represents incorrect representation of defect in crystals?

Options

A.
B.
C.
D.

Explanation

To determine which option represents an incorrect representation of defects in crystals, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding the Types of Defects**:
- **Metal Deficiency Defect**: Occurs when a metal cation is missing from its lattice site, leading to a charge imbalance that is compensated by the presence of a higher charged cation.
- **Schottky Defect**: Involves the simultaneous absence of a cation and an anion from the lattice, maintaining charge neutrality.
- **Frankel Defect**: Occurs when a smaller cation occupies an interstitial site, creating a vacancy at its original lattice position.
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