Grand inverted ditetrahedronary dishecatonicosihexacosichoron

The grand inverted ditetrahedronary dishecatonicosihexacosichoron, or gaid tadhix, is a nonconvex uniform polychoron that consists of 600 tetrahedra, 120 great icosidodecahedra, and 120 ditrigonary dodecadodecahedra. Four tetrahedra, six great icosidodecahedra, and four ditrigonary dodecadodecahedra join at each vertex.

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