Question

The lattice parameters, $a\ne b\ne c$ and $\alpha \ne \beta \ne \gamma \ne {90}^{\circ }$ represents a__________.

• A. tetragonal system
• B. orthorhombic system
• C. monoclinic system
• D. triclinic system

Answer 1

The correct option is D triclinic system

The axial distances and the axial angles, $a\ne b\ne c$ and $\alpha \ne \beta \ne \gamma \ne {90}^{\circ }$ represents triclinic system.
None of the edge lengths are equal and none of the angles are equal to each other. Also, none of the angles are equal to ${90}^0$.
Examples of triclinic crystal systems include $K_{2}C{r}_2{O}_7$ and $H_{3}B{O}_3$.