Small rhombiprismic disoctachoron

The small rhombiprismic disoctachoron, or sirpdo, is a nonconvex uniform polychoron that consists of 8 small rhombihexahedra, 8 great rhombicuboctahedra, and 32 hexagonal prisms. One small rhombihexahedron, two great rhombicuboctahedra, and two hexagonal prisms join at each vertex.

It can be constructed as a blend of four great rhombicuboctahedral prisms. In the process, their cube cells blend out and their octagonal prism cells blend into small rhombihexahedra.

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