Grand ditetrahedronary hexacosihecatonicosachoron

The grand ditetrahedronary hexacosihecatonicosachoron, or gadtaxhi, is a nonconvex uniform polychoron that consists of 600 regular tetrahedra and 120 great ditrigonary icosidodecahedra. 4 great ditrigonary icosidodecahedra and 4 tetrahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the grand ditetrahedronary hexacosidishecatonicosachoron.