Retroinverted prismatoicositetrachoron

The retroinverted prismatoicositetrachoron, or ripi, is a nonconvex uniform polychoron that consists of 24 quasirhombicuboctahedra and 96 triangular prisms. Four quasirhombicuboctahedra and four triangular prisms join at each vertex.

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