Orthorhombic system

The Orthorhombic system is the system of which the unit cell is a rectangular-based right prism, the orthorhombic prism. The three axes have different lengths but the three angles are all 90 degrees. The characteristic symmetry element is a 2-fold symmetry axis: A2. It includes three crystal classes.

The orthorhombic system is one of the seven crystal systems, together with:

• the triclinic system;
• the monoclinic system;
• the hexagonal system;
• the tetragonal system;
• the rhombohedral system;
• the cubic system.