Small diretrosnub pentishexacosidishexacosichoron

The small diretrosnub pentishexacosidishexacosichoron, or sadrospixdox, is a nonconvex uniform polychoron that consists of 600 great icosahedra and 600 small stellated dodecahedra (some of which lie in the same hyperplanes, forming 600 compounds of one of each), 1200 icosahedra (forming 600 snub disoctahedra), 4800 octahemioctahedra (forming 2400 compounds of two), 600 small dodecicosahedra, 600 icosidodecadodecahedra, and 600 small dodecicosidodecahedra.

One great icosahedron and one small stellated dodecahedron (two compounds), two icosahedra (two compounds), eight octahemioctahedra (eight compounds), five small dodecicosahedra, five icosidodecadodecahedra, and five small dodecicosidodecahedra join at each vertex.

It can be obtained as the blend of 5 small dipentary dishecatonicosihexacosihecatonicosachora and 5 small dipentary tetrishecatonicosihexacosichora.

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