13-2 gyrochoron

The 13-2 gyrochoron, also known as mobius 13, is a convex isochoric polychoron with 13 ridge-tritruncated edge-truncated tetrahedra as cells. It can also be constructed as the 13-6 gyrochoron.

Each cell of this polychoron has mirror symmetry, with 2 hendecagons, 8 tetragons, and 2 triangles for faces, and shares a face with every other cell.