Square duoantitegum

The square duoantitegum, also known as the square-square duoantitegum, the 4 duoantitegum or the 4-4 duoantitegum, is a convex isochoric polychoron with 32 elongated tetragonal disphenoids as cells. It is the second in an infinite family of isochoric square hosohedral swirlchora and also the third in an infinite family of isochoric digonal bipyramidal swirlchora, the other being the digonal double tetraswirltegum.