Rhombic small hecatonicosihexacosichoron

The rhombic small hecatonicosihexacosichoron, or rashix, is a nonconvex uniform polychoron that consists of 600 truncated tetrahedra, 120 rhombicosahedra, and 1200 triangular prisms. 2 of each type of cell join at each vertex.

Vertex coordinates
The vertices are the same as those of the regiment colonel, the small rhombated small stellated hecatonicosachoron.