The arrangement of sulphur in zinc blende and wurtzite structures , respectively are

Options

A. hexagonal close packing and cubic close packing
B. cubic close packing and hexagonal close packing
C. simple cubic packing in both the structures
D. hexagonal close packing in both the structures

Answer

To determine the arrangement of sulfur in zinc blende and wurtzite structures, we need to understand the crystal structures of these compounds.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- Zinc blende is represented as ZnS.
- Wurtzite is also represented as ZnS.

2. **Understand the Crystal Structures**:
- **Zinc Blende Structure**:
- The zinc blende structure has a cubic close-packed (CCP) arrangement of sulfur atoms.
- In this structure, the zinc ions occupy the tetrahedral voids of the sulfur CCP lattice.
- The arrangement can be visualized as a face-centered cubic (FCC) lattice where the sulfur atoms are located at the corners and the face centers of the cube.

3. **Wurtzite Structure**:
- The wurtzite structure has a hexagonal close-packed (HCP) arrangement of sulfur atoms.
- In this structure, the zinc ions occupy the tetrahedral voids of the sulfur HCP lattice.
- The arrangement can be visualized as a hexagonal lattice where the sulfur atoms are positioned in a hexagonal pattern.

4. **Conclusion**:
- The arrangement of sulfur in zinc blende is **Cubic Close Packing (CCP)**.
- The arrangement of sulfur in wurtzite is **Hexagonal Close Packing (HCP)**.

### Final Answer:
- The arrangement of sulfur in zinc blende and wurtzite structures, respectively, are **Cubic Close Packing (CCP)** and **Hexagonal Close Packing (HCP)**.