Small invertifrustary pentisicositetrachoron

The small invertifrustary pentisicositetrachoron, or sifopi, is a nonconvex uniform polychoron that consists of 24 quasirhombicuboctahedra, 24 great rhombihexahedra, 24 small rhombicuboctahedra, 24 small rhombihexahedra, and 24 cuboctatruncated cuboctahedra. Two quasirhombicuboctahedra, two great rhombihexahedra, two small rhombicuboctahedra, two small rhombihexahedra, and four cuboctatruncated cuboctahedra join at each vertex.

It has the same cell counts as the great invertifrustary pentisicositetrachoron, but the quasirhombicuboctahedra, great rhombihexahedra, small rhombicuboctahedra, and small rhombihexahedra are in different positions.

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