Small ditrigonary trishecatonicosicubidishexacosichoron

The small ditrigonary trishecatonicosicubidishexacosichoron, or siddit thicdex, is a nonconvex uniform polychoron that consists of 600 cubes (some of which lie in the same hyperplane, forming 120 compound of five cubes), 120 great icosidodecahedra, 600 octahedra, 120 rhombidodecadodecahedra, 120 great icosicosidodecahedra, and 600 cubohemioctahedra. Four cubes (or two compounds), three great icosidodecahedra, three octahedra, six rhombidodecadodecahedra, six great icosicosidodecahedra, and six cubohemioctahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the rectified small ditrigonary hexacosihecatonicosachoron.