Name a compound having body centred cubic unit cell crystal lattice

Explanation

**Step-by-Step Solution:**

1. **Understanding Body-Centered Cubic (BCC) Structure:**
- A body-centered cubic (BCC) unit cell is a type of crystal lattice structure where one atom is located at each of the eight corners of a cube and one atom is located at the center of the cube.

2. **Identifying Compounds with BCC Structure:**
- To answer the question, we need to identify a compound that crystallizes in the BCC structure. Common examples include metals like iron (Fe) at certain temperatures, but since the question specifically asks for a compound, we will focus on ionic compounds.

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