# Snub cube

Snub cube | |
---|---|

Rank | 3 |

Type | Uniform |

Space | Spherical |

Notation | |

Bowers style acronym | Snic |

Coxeter diagram | s4s3s () |

Elements | |

Faces | 8+24 triangles, 6 squares |

Edges | 12+24+24 |

Vertices | 24 |

Vertex figure | Floret pentagon, edge lengths 1, 1, 1, 1, √2 |

Measures (edge length 1) | |

Circumradius | ≈ 1.34371 |

Volume | ≈ 7.88948 |

Dihedral angles | 3–3: ≈ 153.23459° |

4–3: ≈ 142.98343° | |

Central density | 1 |

Number of pieces | 38 |

Level of complexity | 5 |

Related polytopes | |

Army | Snic |

Regiment | Snic |

Dual | Pentagonal icositetrahedron |

Conjugate | Snub cube |

Abstract properties | |

Flag count | 240 |

Euler characteristic | 2 |

Topological properties | |

Surface | Sphere |

Orientable | Yes |

Genus | 0 |

Properties | |

Symmetry | B_{3}+, order 24 |

Convex | Yes |

Nature | Tame |

The **snub cube** or **snic**, also called the **snub cuboctahedron**, is one of the 13 Archimedean solids. Its surface consists of 24 snub triangles, 8 more triangles, and 6 squares, with four triangles and one square meeting at each vertex. It can be obtained by alternation of the great rhombicuboctahedron, followed by adjustment of edge lengths to be all equal.

It is one of two chiral Archimedean solids, the other being the snub dodecahedron.

The triangles come in two types. One group of 8 has rotational triangular symmetry and joins only to other triangles. The other set of 24 has no local symmetry and connects to the square faces, and are the snub faces of the polyhedron.

This is one of nine uniform snub polyhedra generated with one set of digonal faces.

## Measures[edit | edit source]

The circumradius *R* ≈ 1.34371 of the snub cube with unit edge length is the largest real root of

Its volume *V* ≈ 7.88948 is given by the largest real root of

- .

Its dihedral angles can be given as acos(*α*) for the angle between two triangular faces, and acos(*β*) for the angle between a square face and a triangular face, where *α* ≈ –0.89286 equals the unique real root of

and *β* ≈ –0.79846 equals the unique negative real root of

^{[1]}

## Vertex coordinates[edit | edit source]

A snub cube of edge length 1, centered at the origin, has coordinates given by all even permutations with an even number of sign changes, plus all odd permutations with an odd amount of sign changes, of

- (
*c*,_{1}*c*,_{2}*c*),_{3}

where

## Variations[edit | edit source]

The snub cube has a general variant that maintains the chiral cubic symmetry. It generally has 6 squares of one edge size, 8 triangles of a second size, and 24 scalene triangles using the first two edge sizes along with a third edge size, that joins two scalene triangle faces.

The most notable of these variants is the one obtained as the direct alternation of the uniform great rhombicuboctahedron. This variant uses 6 squares of size , 8 triangles of size , and 24 scalene triangles, with one of each of these edges along with edges joining them of length , as faces.

## Related polyhedra[edit | edit source]

The disnub cuboctahedron is a uniform polyhedron compound that consists of the two opposite chiral forms of the snub cube.

It is also related to the cuboctahedron and small rhombicuboctahedron through a twisting operation. Twisting the faces of the small rhombicuboctahedron so the edge-squares become pairs of triangles results in the snub cube. Continuing the twisting until those triangles become edges results in a cuboctahedron.

Name | OBSA | Schläfli symbol | CD diagram | Picture |
---|---|---|---|---|

Cube | cube | {4,3} | x4o3o | |

Truncated cube | tic | t{4,3} | x4x3o | |

Cuboctahedron | co | r{4,3} | o4x3o | |

Truncated octahedron | toe | t{3,4} | o4x3x | |

Octahedron | oct | {3,4} | o4o3x | |

Small rhombicuboctahedron | sirco | rr{4,3} | x4o3x | |

Great rhombicuboctahedron | girco | tr{4,3} | x4x3x | |

Snub cube | snic | sr{4,3} | s4s3s |

## References[edit | edit source]

- ↑ Wolfram Research, Inc. (2023). "Wolfram|Alpha Knowledgebase". Champaign, IL. "
`PolyhedronData["SnubCube", {"Circumradius", "Volume", "DihedralAngles"}]`

".

## External links[edit | edit source]

- Bowers, Jonathan. "Polyhedron Category 6: Snubs" (#64).

- Klitzing, Richard. "Snic".

- Quickfur. "The Snub Cube".

- Wikipedia Contributors. "Snub cube".
- McCooey, David. "Snub Cube"

- Hi.gher.Space Wiki Contributors. "Snub staurohedron".