Small retrofrustary trishecatonicosachoron

The small retrofrustary trishecatonicosachoron, or sirfthi, is a nonconvex uniform polychoron that consists of 120 quasirhombicosidodecahedra, 120 small ditrigonal dodecicosidodecahedra, and 120 small rhombidodecahedra. Two quasirhombicosidodecahedra, two small ditrigonal dodecicosidodecahedra, and two small rhombidodecahedra join at each vertex.

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