Question

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

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

Answer 1

Answer: (D)

$a\ne b\ne c,\alpha =\gamma ={90}^o,\beta \ne {90}^o$

For a monoclinic crystal, the characteristics are:

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

So, correct answer is option D.