Q. For a cubic crystal structure which one of the following relations indicating the cell characteristics is correct?
A) a ≠ b ≠ c and α = β = γ = 90°
B) a = b = c and α ≠ β ≠ γ = 90°
C) a = b = c and α = β = γ = 90°
D) a ≠ b ≠ c and α ≠ β and γ ≠ 90°
Explanation
[Solution from source] A cubic unit cell has all edges equal and all axial angles 90°: a = b = c and α = β = γ = 90°. Unequal edges with right angles describe an orthorhombic cell. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.