Question

The crystal system of a compound with unit cell dimensions `a=0.387,b=0.387` and `c=0.504` and `alpha=beta=90^(@)` and `gamma=120^(@)`is
A. cubic
B. hexagonal
C. Orthorhombic
D. rhombohedral

Answer 1

Correct Answer - 2
In hexagonal crystal axis distance or edges lengths are releated as `a=bnec` and axist angles are related as `alpha=beta=90^(@),gamma=120^(@)`
In both cubic and rhombohedral `a=b=c` and in orthorhombic `ane bne c`