Great rhombated heptapeton

The great rhombated heptapeton or gril, also called the cantitruncated heptapeton or cantitruncated 6-simplex, is a convex uniform polypeton. It consists of 7 great rhombated hexatera, 7 truncated hexatera, and 21 pentachoric prisms. 4 great rhombated hexatera, 1 truncated hexateron, and 1 pentachoric prism join at each vertex. As the name suggests, it is the cantitruncation of the heptapeton.