Solid State - Result Question 9
####9. Which primitive unit cell has unequal edge lengths
(a) Hexagonal
(b) Monoclinic
(c) Tetragonal
(d) Triclinic
(2019 Main, 10 Jan I)
Show Answer
Answer:
Correct Answer: 9. (d)
Solution:
- Triclinic primitive unit cell has dimensions as,
Among the seven basic or primitive crystalline systems, the triclinic system is most unsymmetrical. In other cases, edge length and axial angles are given as follows :
Hexagonal :
Monoclinic :
Tetragonal :
