Question

Monoclinic sulphur is an example of monoclinic crystal system. What are the characteristics of the crystal system?

• A. $a \ne b \ne c$, $\alpha=\beta=\gamma=90^{\circ}$
• B. $a \ne b \ne c$, $\alpha\ne\beta\ne\gamma\ne 90^{\circ}$
• C. $a = b \ne c$, $\alpha=\beta=\gamma=90^{\circ}$
• D. $a \ne b \ne c$, $\alpha=\gamma=90^{\circ}$, $\beta\ne 90^{\circ}$

Answer 1

Answer: (D)

For a monoclinic crystal, the characteristics are:
$a \neq b \neq c \,\,\, \alpha=\gamma=90\,\,\, \&\,\, \beta \neq 90 .$