The Group of symmetries of the Icosahedron and Dodecahedron. The icosahedral group consists of the symmetry operations , , , , , , , , , and (Cotton 1990).
See also Dodecahedron, Icosahedron, Octahedral Group, Tetrahedral Group
References
Cotton, F. A. Chemical Applications of Group Theory, 3rd ed. New York: Wiley, p. 48-50, 1990.
Lomont, J. S. ``Icosahedral Group.'' §3.10.E in Applications of Finite Groups. New York: Dover, p. 82, 1987.