Small dipentary hecatonicosidishexacosichoron

The small dipentary hecatonicosidishexacosichoron, or sad phiddix, is a nonconvex uniform polychoron that consists of 120 icosahedra, 600 truncated tetrahedra, and 600 octahemioctahedra. One icosahedron, five truncated tetrahedra, and five octahemioctahedra join at each vertex.

It can be constructed as a blend of twenty-five prismatorhombisnub icositetrachora.

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