Minerals

Crystal System

結晶質礦物可分為七大晶系

等軸晶系 Cubic

a = b = c; α = β = γ = 90°

正方晶系 Tetragonal

a = b ≠ c; α = β = γ = 90°

六方晶系 Hexagonal

a = b ≠ c; α = β = 90°, γ = 120°

三方晶系 Trigonal

a = b = c; α = β = γ ≠ 90°

斜方晶系 Orthorhombic

a ≠ b ≠ c; α = β = γ = 90°

單斜晶系 Monoclinic

a ≠ b ≠ c; α ≠ 90° = β = γ

三斜晶系 Triclinic

a ≠ b ≠ c; α ≠ β ≠ γ ≠ 90°