Question

For orthorhombic system axial ratios are $a\ne b\ne c$ and the axial angles are:
[1 mark]

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

Answer 1

The correct option is B $\alpha =\beta =\gamma ={90}^o$

For orthorhombic crystal, $a\ne b\ne c$ and axial angles $\alpha =\beta =\gamma ={90}^o$