In a crystal of zinc sulphide , zinc occupies tetrahedral voids . What is the coordination number of zinc ?

Explanation

To determine the coordination number of zinc in a crystal of zinc sulfide (ZnS), where zinc occupies tetrahedral voids, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Zinc Sulfide (ZnS)**:
- Zinc sulfide forms an ionic crystal structure. In this structure, zinc ions (Zn²⁺) and sulfide ions (S²⁻) are arranged in a specific manner.

2. **Identify the Type of Packing**:
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