Body centered cubic lattice has Z=2

Explanation

To prove that a body-centered cubic (BCC) lattice has a coordination number \( Z = 2 \), we can follow these steps:

### Step 1: Understand the Structure of BCC
A body-centered cubic lattice consists of atoms located at the corners of a cube and one atom at the center of the cube.

### Step 2: Count the Atoms at the Corners
In a BCC unit cell, there are 8 corners. Each corner atom contributes \( \frac{1}{8} \) of its volume to the unit cell because it is shared among 8 neighboring unit cells.

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