Triangular antifastegium

The triangular antifastegium, or traf, is a CRF segmentochoron (designated K-4.6 on Richard Klitzing's list). Its cells are a triangular pyramid and 2 octahedra, with 3 tetrahedra and 3 square pyramids filling in the gaps between them.

The triangular antifastegium can be viewed as a vertex-diminished rectified pentachoron.

Representations
A triangular antifastegium has the following Coxeter diagrams:


 * xo3ox ox&#x (triangle atop gyrated triangular prism)
 * xoo3oxx&#x (triangle atop gyrated triangle atop gyrated triangle)