Small rhombiprismic disicositetrachoron

The small rhombiprismic disicositetrachoron, or sirpdi, is a nonconvex uniform polychoron that consists of 24 small rhombihexahedra, 24 great rhombicuboctahedra, and 96 hexagonal prisms. One small rhombihexahedron, two great rhombicuboctahedra, and two hexagonal prisms join at each vertex.

It can be constructed as a blend of three great disprismatotesseractihexadecachora. In the process the truncated octahedra blend out, while the octagonal prisms blend into small rhombihexahedra.

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