Inverted prismatoicositetrachoron

The inverted prismatoicositetrachoron, or ipi, is a nonconvex uniform polychoron that consists of 24 small rhombicuboctahedra and 96 triangular prisms. Four small rhombicuboctahedra and four triangular prisms join at each vertex.

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