Great diretrosnub snub prismatosnubdisnub trishexacosipentishecatonicosachoron

The great diretrosnub snub prismatosnubdisnub trishexacosipentishecatonicosachoron, or gadersosposid stixphi, is a nonconvex uniform polychoron that consists of 600 great icosahedra, 4800 octahemioctahedra (falling into pairs in the same hyperplanes, forming 2400 compounds of two), 600 icosidodecadodecahedra, 600 great dodecicosidodecahedra, 3600 pentagonal prisms, 6000 triangular prisms, and 3000 truncated tetrahedra (600 of which form 120 truncated chiricosahedra).

One great icosahedron, eight octahemioctahedra (eight compounds), five icosidodecadodecahedra, five great dodecicosidodecahedra, five pentagonal prisms, five triangular prisms, and five truncated tetrahedra (one compound and four single) join at each vertex.

It can be obtained as the blend of 5 great dipentary hecatonicosidishexacosichora and 5 great dipentary disprismatohecatonicosihexacosihecatonicosachora. In the process, some of the octahemioctahedron cells blend out.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the great diretrosnub disnub decahecatonicosadishexacosichoron.