Compound of five truncated tetrahedra

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Compound of five truncated tetrahedra
UC55-5 truncated tetrahedra.png
Type Uniform compound
IndexUC55
Polyhedra5 truncated tetrahedra
Faces20 triangles, 20 hexagons
Edges90
Vertices60
Dual Compound of five triakis tetrahedra
Symmetry group chiral icosahedral (I)
Subgroup restricting to one constituent chiral tetrahedral (T)
3D model of a compound of five truncated tetrahedra Compound of five truncated tetrahedra.stl
3D model of a compound of five truncated tetrahedra

The compound of five truncated tetrahedra is a uniform polyhedron compound. It's composed of 5 truncated tetrahedra rotated around a common axis. It may be formed by truncating each of the tetrahedra in the compound of five tetrahedra. A far-enough truncation creates the compound of five octahedra. Its convex hull is a nonuniform snub dodecahedron. It could also be called a truncated chiricosahedron.

Cartesian coordinates

Cartesian coordinates for the vertices of this compound are all the cyclic permutations of

(±1, ±1, ±3)
(±τ−1, ±(−τ−2), ±2τ)
(±τ, ±(−2τ−1), ±τ2)
(±τ2, ±(−τ−2), ±2)
(±(2τ−1), ±1, ±(2τ − 1))

with an even number of minuses in the choices for '±', where τ = (1+5)/2 is the golden ratio (sometimes written φ).

References