(1) Simple cubic unit cell: Lattice points (atoms) are located only at corners of the cube.
(2) Body centered unit cell: Lattice points are located at corners as well as body centre of the cube.
(3) Face centered unit cell: Lattice points are located at corners and centre of faces of the cube.
| Unit cell | Number of Atoms | Total number of atoms per unit cell | Space Lattice | ||
| At corners | At body center | On faces | |||
| Primitive |  | Zero | Zero | One |  |
| FCC | | Zero |  | Four |  |
| BCC | | 1 | Zero | Two |  |
Contribution by an atom in a cubic unit cell.
| Address of an atom (Lattice Point) | Corner of Cube | Edge of Cube | Face of Cube | Body centre |
| Contribution |  |  |  | One per unit Cell |
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