Small rhombated grand hexacosichoron

The small rhombated grand hexacosichoron, or sirgax, is a nonconvex uniform polychoron that consists of 600 cuboctahedra, 720 pentagrammic prisms, and 120 great icosidodecahedra. 1 great icosidodecahedron, 2 pentagrammic prisms, and 2 cuboctahedra join at each vertex. It can be obtained by cantellating the grand hexacosichoron.