Question

The parameters of the unit cell of a substance are a = 2.5, b = 3.0, c = 4.0, α = 90°, β = 120°, γ = 90°. The crystal system of the substance is ______.

Options

• Hexagonal 

• Orthorhombic 

• Monoclinic 

• Triclinic

Answer 1

The parameters of the unit cell of a substance are a = 2.5, b = 3.0, c = 4.0, α = 90°, β = 120°, γ = 90°. The crystal system of the substance is Monoclinic.

Explanation:

a ≠ b ≠ c and α = γ = 90° ≠ β are parameters of monoclinic unit cell.