Small rhombiprismic tesseractihexadecachoron

The small rhombiprismic tesseractihexadecachoron, or sirpith, is a nonconvex uniform polychoron that consists of 16 cubohemioctahedra, 24 octagonal prisms, and 8 great rhombicuboctahedra. One cubohemioctahedron, two octagonal prisms, and two great rhombicuboctahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the prismatorhombated hexadecachoron.