Small diretrosnub prismatosnubdisnub dishexacositetrishexacosichoron

The small diretrosnub prismatosnubdisnub dishexacositetrishexacosichoron, or sadersposid sadixtux, is a nonconvex uniform polychoron that consists of 1200 great icosahedra (some of which lie in the same hyperplanes, forming 600 small retrosnub disoctahedra), 600 icosahedra and 600 great dodecahedra (forming 600 compounds of one of each), 4800 octahemioctahedra (forming 2400 compounds of two), 600 small dodecicosahedra, 600 icosidodecadodecahedra, 3600 pentagrammic prisms, and 6000 triangular prisms.

Two great icosahedra (two compounds), one icosahedron and one great dodecahedron (two compounds), eight octahemioctahedra (eight compounds), five small dodecicosahedra, five icosidodecadodecahedra, five pentagrammic prisms, and five triangular prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary dishecatonicosihexacosihecatonicosachora and 5 small dipentary disprismatotrishecatonicosihexacosichora. In the process, some of the octahemioctahedron cells blend out.

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