The crystal system of a compound with unit cell dimensions $a = 0.387 n m$ , $b = 0.387 n m$ and $c = 0.504 n m$ and $α = β = 90^{\circ}$ and $= 120^{\circ}$ is :

cubic

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hexagonal

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orthorhombic

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rhomobohedral

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Solution

The correct option is B hexagonal

Unit cell dimensions of hexagonal unit cell are $a = b \neq c$ and $α = β = 90^{\circ}$ and $γ = 120^{\circ}$ .
Examples are $Z n O, C d S$

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Similar questions

a = 0.387, b = 0.387, c = 0.504 n m

α = β = 90^{\circ}

γ = 120^{\circ}

" a = 0.387, b = 0.387

c = 0.504 n m

α = β = 90^{\circ}

γ = 120^{\circ} "

The crystal system of a compound with unit cell dimension, a = 0.387 nm, b = 0.387 nm, c = 0.504 nm and α = β = 90^o and γ = 120^o is

α = β = 90^{\circ} a n d γ = 120^{\circ}

a, b, c

α, β, γ

a \neq b \neq c, α = γ = 90^{\circ}, β \neq 90^{\circ}

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