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The crystal system of a compound with un...

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^(@)and gamma=120^(@)` is

A

Cubic

B

hexagonal

C

orthorhombic

D

rhombohedral

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The correct Answer is:
B
when a=b ne c,`alpha=beta=90^(@),gamma=120^(@)`
The given condition is characteristic of hexagonal system.
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