Small dipentary trishecatonicosihecatonicosihexacosichoron

The small dipentary trishecatonicosihecatonicosihexacosichoron, or sidpathihix, is a nonconvex uniform polychoron that consists of 120 great icosahedra, 120 great dodecahedra, 600 octahemioctahedra, 120 icosidodecadodecahedra, and 120 small ditrigonal dodecicosidodecahedra. One great icosahedron, one great dodecahedron, five octahemioctahedra, five icosidodecadodecahedra, and five small ditrigonal dodecicosidodecahedra join at each vertex.

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