Small disnub prismatosnub dishexacositetrishexacosichoron

The small disnub prismatosnub dishexacositetrishexacosichoron, or sidsposduxtix, is a nonconvex uniform polychoron that consists of 1200 great icosahedra (some of which lie in the same hyperplanes, forming 600 small retrosnub disoctahedra), 4800 cuboctahedra (forming 2400 compounds of two), 600 truncated icosahedra, 600 rhombidodecadodecahedra, 600 small ditrigonal dodecicosidodecahedra and 600 small icosicosidodecahedra (forming 600 compounds of one of each), and 3600 pentagrammic prisms.

Two great icosahedra (two compounds), eight cuboctahedra (eight compounds), five truncated icosahedra, five rhombidodecadodecahedra, five small ditrigonal dodecicosidodecahedra and five small icosicosidodecahedra (ten compounds), and five pentagrammic prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary hexacosiprismatodishecatonicosachora and 5 small dipentary hexacosidishecatonicosidishecatonicosachora.

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