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.