which of the follwing defects is also known as dislocation defect ?

Options

A. Frenkel defect
B. Schottky defect
C. Non-stoichiometric defect
D. Simple interstitial defect

Answer

To solve the question "Which of the following defects is also known as dislocation defect?", we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Types of Defects**:
- In solid-state chemistry, defects in crystals can be classified into different types. The common types include point defects (like vacancies and interstitials), line defects (like dislocations), and surface defects.

2. **Identifying the Options**:
- The options given are:
- A) Sprinkle defect
- B) Schottky defect
- C) Non-stoichiometric defect
- D) Simple interstitial defect

3. **Analyzing Each Option**:
- **A) Sprinkle defect**: This defect occurs when an atom is displaced from its lattice point to an interstitial site, creating a vacancy at the original lattice point. This movement of atoms is characteristic of dislocation defects.
- **B) Schottky defect**: This defect involves the absence of an equal number of cations and anions from the lattice, maintaining charge neutrality. It does not involve dislocation.
- **C) Non-stoichiometric defect**: This refers to defects that occur in compounds where the ratio of the constituent elements deviates from the ideal stoichiometric ratio. This is not a dislocation defect.
- **D) Simple interstitial defect**: This defect occurs when extra atoms occupy interstitial sites in the lattice. It does not involve dislocation of atoms from their lattice points.

4. **Conclusion**:
- Based on the analysis, the **Sprinkle defect** (also known as **Frenkel defect**) is the one that involves the dislocation of atoms from their lattice points to interstitial sites, thereby creating vacancies. Therefore, the correct answer is **A) Sprinkle defect**.

### Final Answer:
**A) Sprinkle defect**