Retroinverted hecatonicosihexacosichoron

The retroinverted hecatonicosihexacosichoron, or rihix, is a nonconvex uniform polychoron that consists of 120 great icosidodecahedra and 600 truncated tetrahedra. Five great icosidodecahedra and ten truncated tetrahedra join at each vertex.

It also has icosahedra as pseudofacets.

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