Q. The crystal system of a compound with unit cell dimensions, $a = 0.387,\ b = 0.387$ and $c = 0.504\ nm$, and $\alpha = \beta = 90{^\circ}$ and $\gamma = 120{^\circ}$ is

A) Cubic
B) Hexagonal
C) Orthorhombic
D) Rhombohedral
Explanation

(b)
Given, $a = b \neq c,\ \alpha = \beta = 90{^\circ},\gamma = 120{^\circ}$
This is true for hexagonal system

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.