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

NTA AbhyasNTA Abhyas 2022

Solution:

For the given crystal,
$a=b\neq c,\alpha =\beta =90^{o},\gamma =120^{o}$
These are the characteristic of a hexagonal system.