7-2 gyrochoron

The 7-2 gyrochoron, also known as mobius 7, is a convex isochoric polychoron and member of the gyrochoron family with 7 bilaterally-symmetric edge-truncated tetrahedra as cells. It is the simplest gyrochoron after the pentachoron and triangular duoprism, both members of existing families, as well as the only isochoric polychoron with 7 cells. It can also be constructed as the 7-3 gyrochoron. It is also the triangular funk prism.

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

Isogonal derivatives
Substitution by vertices of these following elements will produce these convex isogonal polychora:
 * Edge-truncated tetrahedron (7): 7-2 step prism
 * Mirror-symmetric pentagon (7): 7-2 step prism
 * Kite (7): 7-2 step prism
 * Isosceles triangle (7): 7-2 step prism
 * Edge (7): 7-2 step prism
 * Edge (14): 14-2 step prism
 * Vertex (7): 7-2 step prism