Polytopes of Type {2,4,21}

This page is part of the Atlas of Small Regular Polytopes
(See Other Polytopes of Rank 4)

There are 2 polytopes of this type in this atlas. They are :
  1. {2,4,21}*336 (SmallGroup(336,215)) (Universal)
  2. {2,4,21}*672 (SmallGroup(672,1263)) (Universal)