Faceted rectified pentachoron

The faceted rectified pentachoron, or firp, is a nonconvex uniform polychoron that consists of 5 regular tetrahedra and 10 triangular prisms. Two tetrahedra and six triangular prisms join at each vertex.

It is also the crossed tetrahedral cuploid.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the rectified pentachoron.