Question

The most unsymmetrical crystal system is:

• A. Hexagonal
• B. Orthorhombic
• C. Cubic
• D. Triclinic

Answer 1

The correct option is D Triclinic

The most unsysmmetrical crystal system is triclinic while the most symmetrical crystal system is cubic.
The axial distances and the axial angles, $a\ne b\ne c\text{and}\alpha \ne \beta \ne \gamma \ne {90}^o$ represents triclinic system.
None of the edge legths is equal and none of the angles is equal to each other. Also, none of the angle is equal to ${90}^o.$


Examples of triclinic crystal systems include $K_{2}C{r}_2{O}_7$ and $H_{3}B{O}_3.$
Hence, the correct option is C.