Small snubspinosnub prismatosnub hexacosipentishexacosichoron

The small snubspinosnub prismatosnub hexacosipentishexacosichoron, or sosanspos xopex, is a nonconvex uniform polychoron that consists of 1200 small stellated dodecahedra (some of which lie in the same hyperplanes, forming 600 pentagrammatic snub pseudodisoctahedra), 600 icosahedra, 2400 cuboctahedra and 2400 cubohemioctahedra (forming 2400 compounds of one of each), 600 octahemioctahedra (forming 120 icosidisicosahedra), 600 rhombidodecadodecahedra, 600 small dodecicosidodecahedra, 600 small dodecicosahedra, and 3600 pentagrammic prisms.

Two small stellated dodecahedra (two compounds), one icosahedron, four cuboctahedra and four cubohemioctahedra (eight compounds), one octahemioctahedron (one compound), five rhombidodecadodecahedra, five small dodecicosidodecahedra, five small dodecicosahedra, and five pentagrammic prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary hexacositetrishecatonicosachora and 5 small dipentary hecatonicosiprismatohecatonicosihexacosichora. In the process, some of the cuboctahedron and cubohemioctahedron cells blend out.

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