Medial retropental hecatonicosachoron

The medial retropental hecatonicosachoron, or mriphi, is a nonconvex noble uniform polychoron that consists of 120 small dodecicosahedra. Ten small dodecicosahedra meet at each vertex.

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