The tetragonal lattice has all of its angles equal to 90°, and has two out of the three sides of equal length (a = b). The system also includes body-centered tetragonal (Figure 7.1. ... In an orthorhombic lattice all of the angles are equal to 90°, while all of its sides are of unequal length.

Which is true about tetragonal system?

All axial lengths and all axial angles are equal.

What are the characteristics of tetragonal system?

Crystals in a tetragonal system are characterized by three mutually perpendicular axes, two of which are equal in length.