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:
$a\ne b\ne c\alpha =\gamma =90\&\beta \ne 90.$