Structure similar to zinc blende is found in :

Options

A. AgCl
B. NaCl
C. CuCl
D. TlCl

Answer

To solve the question regarding which structure is similar to zinc blende, we will analyze the properties of zinc blende and compare them with the given options.

### Step-by-Step Solution:

1. **Understanding Zinc Blende Structure**:
- Zinc blende (ZnS) has a face-centered cubic (FCC) lattice structure.
- In this structure, zinc ions (Zn²⁺) occupy the face-centered positions and sulfur ions (S²⁻) occupy the tetrahedral holes.
- The coordination number for both Zn²⁺ and S²⁻ in zinc blende is 4, meaning each ion is surrounded by 4 ions of the opposite charge.

2. **Analyzing the Options**:
- We need to check the structure and coordination number of each option provided.

3. **Option A: AgCl**:
- AgCl has a FCC structure.
- In AgCl, Ag⁺ ions occupy the face-centered positions, and Cl⁻ ions occupy the corners.
- The coordination number of Ag⁺ in AgCl is 6 (each Ag⁺ is surrounded by 6 Cl⁻).
- **Conclusion**: Not similar to zinc blende (coordination number is 6).

4. **Option B: NaCl**:
- NaCl also has a FCC structure.
- Na⁺ ions occupy the face-centered positions, and Cl⁻ ions occupy the corners.
- The coordination number of Na⁺ in NaCl is 6 (each Na⁺ is surrounded by 6 Cl⁻).
- **Conclusion**: Not similar to zinc blende (coordination number is 6).

5. **Option C: CuCl**:
- CuCl has a FCC structure.
- Cu⁺ ions occupy the face-centered positions, and Cl⁻ ions occupy the tetrahedral holes.
- The coordination number of Cu⁺ in CuCl is 4 (each Cu⁺ is surrounded by 4 Cl⁻).
- **Conclusion**: Similar to zinc blende (coordination number is 4).

6. **Option D: TlCl**:
- TlCl can have various structures, but it is typically not FCC.
- The coordination number for Tl⁺ in TlCl is not definitively 4.
- **Conclusion**: Not similar to zinc blende.

7. **Final Answer**:
- The structure similar to zinc blende is found in **Option C: CuCl**.