Great retropental hecatonicosachoron

The great retropental hecatonicosachoron, or griphi, is a nonconvex noble uniform polychoron that consists of 120 great dodecicosahedra. Ten great dodecicosahedra join at each vertex.

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