Great triangular double tetraswirltegum

The great triangular double tetraswirltegum is a convex isochoric polychoron with 72 identical cells. It is the fourth in an infinite family of isochoric triangular tegmatic swirlchora, the others being the small triangular double tetraswirltegum and transitional triangular double tetraswirltegum.

Each cell of this polychoron has bilateral symmetry, with 1 rectangular-symmetric octagon, 4 mirror-symmetric hexagons, 6 kites, and 2 isosceles triangles for faces.