Tetrakis cuboctahedron

The tetrakis cuboctahedron is a convex polyhedron with 32 triangular faces, 48 edges, and 18 vertices. It is a dual of the truncated rhombic dodecahedron.

Tetrakis cuboctahedron
Conway notationk4aC
Faces32 triangles (2 types)
Edges48 (2 types)
Vertices18 (2 types)
Vertex configurations(6) 35
(12) 36
Symmetry groupOctahedral (Oh)
Dual polyhedronchamfered cube
Propertiesconvex
A cat toy in the shape of a tetrakis cuboctahedron projected onto a sphere
Tetrakis cuboctahedrons in a 3D ball-and-stick model of a diamond lattice

Its name comes from a topological construction from the cuboctahedron with the kis operator applied to the square faces. In this construction, all the vertices are assumed to be the same distance from the center, while in general octahedral symmetry can be maintain even with the 6 order-4 vertices at a different distance from the center as the other 12.

It can also be topologically constructed from the octahedron, dividing each triangular face into 4 triangles by adding mid-edge vertices (an ortho operation). From this construction, all 32 triangles will be equilateral.

This polyhedron can be confused with a slightly smaller Catalan solid, the tetrakis hexahedron, which has only 24 triangles, 32 edges, and 14 vertices.

See also

References

  • John H. Conway, Heidi Burgiel, Chaim Goodman-Strass, The Symmetries of Things 2008, ISBN 978-1-56881-220-5
    • Chapter 21: Naming the Archimedean and Catalan polyhedra and Tilings (p284)
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