Small hecatonicosihexacosihecatonicosachoron

The small hecatonicosihexacosihecatonicosachoron, or shixhi, is a nonconvex uniform polychoron that consists of 600 truncated tetrahedra, 120 small dodecicosahedra, and 120 truncated dodecahedra. 2 of each type of cell join at each vertex.

Vertex coordinates
The vertices are the same as those of the regiment colonel, the sphenoverted hecatonicosidishexacosichoron.