Pentagonal duoantitegum

The pentagonal duoantitegum, also known as the pentagonal-pentagonal duoantitegum, the 5 duoantitegum or the 5-5 duoantitegum, is a convex isochoric polychoron with 50 elongated tetragonal disphenoids as cells. Together with its dual, it is the first in an infinite family of pentagonal antiprismatic swirlchora. It is the second in an infinite family of isochoric pentagonal hosohedral swirlchora.