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 third in an infinite family of isochoric digonal bipyramidal swirlchora, the other being the digonal double tetraswirltegum.