Small retrospinosnub tetrishexacosichoron

The small retrospinosnub tetrishexacosichoron, or sarnistux, is a nonconvex uniform polychoron that consists of 600 icosahedra, 2400 octahemioctahedra and 2400 cubohemioctahedra (some of which lie in the same hyperplanes, forming 2400 compounds of one of each), 600 cuboctahedra (forming 120 antirhombicosicosahedra), 600 truncated icosahedra, 600 small dodecicosidodecahedra, and 600 rhombicosahedra.

One icosahedron, four octahemioctahedra and four cubohemioctahedra (eight compounds), one cuboctahedron (one compound), five truncated icosahedra, five small dodecicosidodecahedra, and five rhombicosahedra join at each vertex.

It can be obtained as the blend of 5 small invertidipentary hecatonicosihexacosidishecatonicosachora and 5 small dipentary hexacosihecatonicosachora. In the process, some of the octahemioctahedron and cubohemioctahedron cells blend out.

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