Small dipentary hecatonicosihecatonicosihexacosichoron

The small dipentary hecatonicosihecatonicosihexacosichoron, or sidphihix, is a nonconvex uniform polychoron that consists of 120 great icosahedra, 600 truncated tetrahedra, and 120 small dodecicosahedra. One great icosahedron, five truncated tetrahedra, and five small dodecicosahedra join at each vertex.

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