Decahemidecachoron

The decahemidecachoron, or duhd, is a nonconvex uniform polychoron that consists of 10 regular tetrahedra and 5 octahemioctahedra. 2 tetrahedra and 3 octahemioctahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the small prismatodecachoron.