With the help of a labelled diagram show that there are four octahedral voids per unit cell in cubic close packed structure .

Explanation

To show that there are four octahedral voids per unit cell in a cubic close-packed (CCP) structure, we can follow these steps:

### Step 1: Draw the Unit Cell
- Start by drawing a cube to represent the unit cell of the cubic close-packed structure.
- Label the corners of the cube where the atoms are located. There are 8 corner atoms in total.

### Step 2: Add Face-Centered Atoms
- Next, draw the atoms located at the center of each face of the cube. There are 6 face-centered atoms (one on each face).
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