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Compound of twenty octahedra

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Compound of twenty octahedra
Type Uniform compound
Index UC14
Polyhedra 20 octahedra
Faces 40+120 triangles
Edges 240
Vertices 60
Symmetry group icosahedral (Ih)
Subgroup restricting to one constituent 6-fold improper rotation (S6)
3D model of a compound of twenty octahedra

The compound of twenty octahedra is a uniform polyhedron compound. It's composed of a symmetric arrangement of 20 octahedra (considered as triangular antiprisms). It is a special case of the compound of 20 octahedra with rotational freedom, in which pairs of octahedral vertices coincide.

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This compound shares its edge arrangement with the great dirhombicosidodecahedron, the great disnub dirhombidodecahedron, and the compound of twenty tetrahemihexahedra.

It may be constructed as the exclusive or of the two enantiomorphs of the great snub dodecicosidodecahedron.


Convex hull

Great snub dodecicosidodecahedron

Great dirhombicosidodecahedron

Great disnub dirhombidodecahedron

Compound of twenty octahedra

Compound of twenty tetrahemihexahedra

See also

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References

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  • Skilling, John (1976), "Uniform Compounds of Uniform Polyhedra", Mathematical Proceedings of the Cambridge Philosophical Society, 79: 447–457, doi:10.1017/S0305004100052440, MR 0397554.