Ina crystal of zinc sulphide, zinc occupies tetrahedral voids. What is the coodination 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 1: Understand the Structure of Zinc Sulfide
Zinc sulfide (ZnS) has a crystal structure where zinc ions (Zn²⁺) and sulfide ions (S²⁻) are arranged in a specific manner. In this case, the sulfide ions form a close-packed structure.

**Hint:** Remember that in ionic compounds, cations and anions arrange themselves to minimize energy and maximize stability.

### Step 2: Identify the Type of Void Occupied by Zinc
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