Small disnub prismatosnubdisnub tetrishexacosichoron

The small disnub prismatosnubdisnub tetrishexacosichoron, or sidsposidstux, is a nonconvex uniform polychoron that consists of 600 great icosahedra, 4800 cuboctahedra (some of which lie in the same hyperplanes, forming 2400 compounds of two), 600 truncated icosahedra, 600 small icosicosidodecahedra, 600 small dodecicosidodecahedra, 6000 triangular prisms, and 3600 pentagrammic prisms.

One great icosahedron, eight cuboctahedra (eight compounds), five truncated icosahedra, five small icosicosidodecahedra, five small dodecicosidodecahedra, five triangular prisms, and five pentagrammic prisms join at each vertex.

It can be obtained as the blend of 5 small dipentary prismatohexacosihecatonicosachora and 5 small dipentary prismatohexacositrishecatonicosachora.

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