Small diretrosnub dishexacosipentishexacosichoron

The small diretrosnub dishexacosipentishexacosichoron, or sadrosid xippix, 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 and 600 small ditrigonal dodecicosidodecahedra (forming 600 compounds of one of each), and 600 icosidodecadodecahedra.

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

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

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