Compound of six cubes with rotational freedom
From HandWiki
Short description: Polyhedral compound
| Compound of six cubes with rotational freedom | |
|---|---|
| |
| Type | Uniform compound |
| Index | UC7 |
| Polyhedra | 6 cubes |
| Faces | 12+24 squares |
| Edges | 72 |
| Vertices | 48 |
| Symmetry group | octahedral (Oh) |
| Subgroup restricting to one constituent | 4-fold rotational (C4h) |
This uniform polyhedron compound is a symmetric arrangement of 6 cubes, considered as square prisms. It can be constructed by superimposing six identical cubes, and then rotating them in pairs about the three axes that pass through the centres of two opposite cubic faces. Each cube is rotated by an equal (and opposite, within a pair) angle θ.
When θ = 0, all six cubes coincide. When θ is 45 degrees, the cubes coincide in pairs yielding (two superimposed copies of) the compound of three cubes.
Cartesian coordinates
Cartesian coordinates for the vertices of this compound are all the permutations of
- [math]\displaystyle{ (\pm(\cos(\theta)+\sin(\theta)), \pm(\cos(\theta)-\sin(\theta)), \pm1). }[/math]
Gallery
- Compounds of six cubes with rotational freedom
θ = 0°
θ = 5°
θ = 10°
θ = 15°
θ = 20°
θ = 25°
θ = 30°
θ = 35°
θ = 40°
θ = 45°
References
- Skilling, John (1976), "Uniform Compounds of Uniform Polyhedra", Mathematical Proceedings of the Cambridge Philosophical Society 79: 447–457, doi:10.1017/S0305004100052440.
 |  |
