9-3 gyrochoron

The 9-3 gyrochoron, also known as the trigon tricoil, is a convex isochoric polychoron and member of the gyrochoron family with 9 tetragonal antiwedges as cells.

It is one of three isochoric polychora with 9 cells (the others are the 9-2 gyrochoron and triangular duotegum).

Each cell of this polychoron has mirror symmetry, with 2 tetragons and 4 triangles for faces.

Isogonal derivatives
Substitution by vertices of these following elements will produce these convex isogonal polychora:
 * Tetragonal antiwedge (9): 9-3 step prism
 * Kite (9): 9-3 step prism
 * Isosceles triangle (9): 9-3 step prism
 * Edge (9): 9-3 step prism
 * Edge (18): 18-3 step prism
 * Vertex (9): 9-3 step prism