About this 3D model

All minerals fall into one of six crystal classes based on the ordering of their component elements and polyatomic ions. Isometric, a=b=c, alpha=beta=gamma=90 degrees Tetragonal: a=b<>c, alpha, beta, and gamma equal 90 degrees Orthorhombic: a, b, and c are unequal; alpha, beta, and gamma equal 90 degrees; a=20, b=30, c=40 Hexagonal: a=b<>c; alpha=beta=90 degrees, gamma=120 degrees; Monoclinic, a, b, and c are unequal; alpha and gamma = 90 degrees, beta does not equal 90 degrees Triclinic: a,b, and c are unequal; neither alpha, nor beta, nor gamma equal 90 degrees