Chemistry - Solid State Question with Solution | TestHub

The seven crystal systems give rise to $14$ Bravais lattices.

For the tetragonal crystal system, the axial distances are $a=b\ne c$ and the axial angles are $\alpha =\beta =\gamma =90^{\circ }$.

There are $2$ possible variations of unit cells in the tetragonal crystal system: Primitive (or Simple) tetragonal and Body-centered tetragonal.

Thus, the number of unit cells present in the tetragonal crystal system is $2$.

Answer: $2$