Small retrofrustary pentishecatonicosihexacosichoron

The small retrofrustary pentishecatonicosihexacosichoron, or sirfophix, is a nonconvex uniform polychoron that consists of 120 dodecadodecahedra, 600 octahedra, 120 great dodecicosahedra, 120 small dodecicosidodecahedra, 120 small icosicosidodecahedra, and 120 icosidodecatruncated icosidodecahedra. One dodecadodecahedron, one octahedron, two great dodecicosahedra, two small dodecicosidodecahedra, two small icosicosidodecahedra, and four icosidodecatruncated icosidodecahedra join at each vertex.

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