Medial rotational 8-3 bigyrochoron

The medial 8-3 bigyrochoron, also known as the cracked 16, is a convex isochoric polychoron with 16 identical cells.

Each cell of this polychoron is completely asymmetric, with 2 enneagons, 3 hexagons, 3 tetragons, and 4 triangles for faces.