What is primitive cell ?

Explanation

### Step-by-Step Solution:

1. **Definition of Primitive Cell**:
A primitive cell is the smallest repeating unit in a crystal lattice that, when repeated in three-dimensional space, can recreate the entire lattice structure.

2. **Lattice Points**:
In a primitive cell, the lattice points (which represent the positions of atoms, ions, or molecules) are located only at the corners of the cell. This means that each corner of the cell contributes to the overall structure of the crystal.

...