Small diretrosnub snub prismatosnubdisnub trishexacosipentishecatonicosachoron

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

One icosahedron, eight octahemioctahedra (eight compounds), five icosidodecadodecahedra, five small dodecicosidodecahedra, five pentagrammic 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 small dipentary hecatonicosidishexacosichora and 5 small dipentary disprismatohecatonicosihexacosihecatonicosachora.

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