Compound of five octahedra
|Compound of five octahedra|
(As a compound)
F = 40, E = 60, V = 30
|Dual compound||Compound of five cubes|
|Symmetry group||icosahedral (Ih)|
|Subgroup restricting to one constituent||pyritohedral (Th)|
The compound of five octahedra is one of the five regular polyhedron compounds. This polyhedron can be seen as either a polyhedral stellation or a compound. This compound was first described by Edmund Hess in 1876. It is unique among the regular compounds for not having a regular convex hull.
As a stellationEdit
It can be constructed by a rhombic triacontahedron with rhombic-based pyramids added to all the faces, as shown by the five colored model image. (This construction does not generate the regular compound of five octahedra, but shares the same topology and can be smoothly deformed into the regular compound.)
It has a density of greater than 1.
|Stellation diagram||Stellation core||Convex hull|
As a compoundEdit
It shares its edges and half of its triangular faces with the compound of five tetrahemihexahedra.
Compound of five tetrahemihexahedra
As a spherical tiling the octahedra edges match the disdyakis triacontahedron
As a facetingEdit
- Regular polytopes, pp.49-50, p.98
- Peter R. Cromwell, Polyhedra, Cambridge, 1997.
- Wenninger, Magnus (1974). Polyhedron Models. Cambridge University Press. ISBN 0-521-09859-9.
- Coxeter, Harold Scott MacDonald; Du Val, P.; Flather, H. T.; Petrie, J. F. (1999). The fifty-nine icosahedra (3rd ed.). Tarquin. ISBN 978-1-899618-32-3. MR 0676126. (1st Edn University of Toronto (1938))
- H.S.M. Coxeter, Regular Polytopes, (3rd edition, 1973), Dover edition, ISBN 0-486-61480-8, 3.6 The five regular compounds, pp.47-50, 6.2 Stellating the Platonic solids, pp.96-104
- E. Hess 1876 Zugleich Gleicheckigen und Gleichflächigen Polyeder, Schriften der Gesellschaft zur Berörderung der Gasammten Naturwissenschaften zu Marburg 11 (1876) pp 5–97.
- MathWorld: Octahedron5-Compound
- Paper Model Compound of Five Octahedra
- VRML model: [permanent dead link]
- Klitzing, Richard. "3D compound".
|Notable stellations of the icosahedron|
|Regular||Uniform duals||Regular compounds||Regular star||Others|
|(Convex) icosahedron||Small triambic icosahedron||Medial triambic icosahedron||Great triambic icosahedron||Compound of five octahedra||Compound of five tetrahedra||Compound of ten tetrahedra||Great icosahedron||Excavated dodecahedron||Final stellation|
|The stellation process on the icosahedron creates a number of related polyhedra and compounds with icosahedral symmetry.|
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