Question

A unit cell with edge length $a\ne b\ne c$ and axial angles $\alpha =\beta =\gamma =90^{\circ}$ is called

• A. cubic
• B. tetragonal
• C. orthorhombic
• D. hexagonal

Answer 1

Answer: (C)

orthorhombic

Answer 2

A unit cell with edge length $a \neq b \neq c$ and axial angles $\alpha=\beta=\gamma=90^{\circ}$ is called ortho rhombic.
E.g. rhombic sulphur, $KNO _{3}$ and $BaSO _{4}$.