Small retrofrustary distetracontoctachoron

The small retrofrustary distetracontoctachoron, or sirfaddic, is a nonconvex uniform polychoron that consists of 48 quasirhombicuboctahedra and 48 small rhombicuboctahedra. Four quasirhombicuboctahedra and four small rhombicuboctahedra join at each vertex.

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