Triclinic

a ≠ b ≠ c
α ≠ β ≠ γ

Triclinic

Monoclinic

a ≠ b ≠ c
α ≠ 90°
β = γ= 90°

Monoclinic simple

Monoclinic Base centered

Orthorhombic

a ≠ b ≠ c
α = β = γ = 90°

Orthorhombic simple

Base centered

Face centered

Body centered

Tetragonal

a = b ≠ c
α = β = γ = 90°

Simple

Body centered

Trigonal

a = b = c
α = β = γ ≠ 90°

Trigonal

Hexagonal

a = b ≠ c
α = 120°, β = γ = 90°

Hexagonal

Cubic

a = b = c
α = β = γ = 90°

Simple

Face centered

Body centered