Great pentaantitegmatoswirlic diacosichoron

The pentaantitegmatoswirlic diacosichoron is an isochoric polychoron with 200 identical cells. It is the second in an infinite family of isochoric pentagonal antitegmatic swirlchora.

Each cell of this polychoron has bilateral symmetry, with 2 mirror-symmetric octagons, 4 mirror-symmetric hexagons, 4 isosceles triangles, and 4 scalene triangles for faces.