Small dipentary hecatonicosihexacosidishecatonicosihexacosichoron

The small dipentary hecatonicosihexacosidishecatonicosihexacosichoron, or sidphixdahix, is a nonconvex uniform polychoron that consists of 120 great dodecahedra, 600 truncated tetrahedra, 600 cuboctahedra, 120 rhombidodecadodecahedra, and 120 small icosicosidodecahedra. One great dodecahedron, five truncated tetrahedra, five cuboctahedra, five rhombidodecadodecahedra, and five small icosicosidodecahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the prismatodishecatonicosachoron.