JEE PYQ: Solid State Question 20
Question 20 - 2019 (10 Jan Shift 1)
Which primitive unit cell has unequal edge lengths ($a \neq b \neq c$) and all axial angles different from 90$^\circ$?
(1) Triclinic
(2) Hexagonal
(3) Monoclinic
(4) Tetragonal
Show Answer
Answer: (1)
Solution
For triclinic crystal: $a \neq b \neq c$ (edge lengths), $\alpha \neq \beta \neq \gamma$ (axial angles).