(B) The monoclinic crystal system is one of the $7$ primitive crystal systems. In a monoclinic unit cell,the side lengths are unequal,represented as $

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$a \neq b \neq c$ and $\alpha = \gamma = 90^{\circ} \neq \beta$

(B) The monoclinic crystal system is one of the $7$ primitive crystal systems. In a monoclinic unit cell,the side lengths are unequal,represented as $a \neq b \neq c$. The angles are defined such that two angles are $90^{\circ}$ and one is not,specifically $\alpha = \gamma = 90^{\circ}$ and $\beta \neq 90^{\circ}$.

Class 12 Chemistry Solid State Crystallography and Lattice

Easy

In a monoclinic unit cell,the relation of sides and angles are respectively

JEE MAIN 2014 All JEE MAIN

A
$a \neq b \neq c$ and $\alpha = \beta = \gamma = 90^{\circ}$
B
$a \neq b \neq c$ and $\alpha = \gamma = 90^{\circ} \neq \beta$
C
$a \neq b \neq c$ and $\alpha = \gamma = 90^{\circ} \neq \beta$ (Note: Corrected to match standard definition)
D
$a \neq b \neq c$ and $\alpha \neq \beta \neq \gamma \neq 90^{\circ}$