Question

What is the relation between the edge lengths ${}^{\prime }{a}^{\prime }{,}^{\prime }{b}^{\prime }$ and ${}^{\prime }{c}^{\prime }$ in body centered orthodontic crystal?

Answer 1

Body-centered orthorhombichas lattice points at the eight corners of the unit cell plus an additional points at the center of the cell. It has unit cell vectors a not equa to b and b not equal to c and interaxial angles $\alpha =\beta =\gamma ={90}^0$.