Rotational Groups with One Proper and Two Improper Axes

1
Rotational Groups withOne Proper and Two
Improper Axes
2
Rotational Groups with SimultaneouslyProper/Impro
per Axes
3
Three Platonic Solids and Relation to a Cube
Tetrahedron
Octahedron
Cube
Vertices 4 Edges 6 Faces 4
Vertices 6 Edges 12 Faces 8
Vertices 8 Edges 12 Faces 6
4
Symmetry of a Tetrahedron
5
Symmetry of an Octahedron
6
Symmetry of a Cube
7
Lattices
8
Unit-Cell Specification
9
Lattice Plane
10
Family of Planes