Small tritrigonary hecatonicosidishexacosihecatonicosachoron

The small tritrigonary hecatonicosidishexacosihecatonicosachoron, or sit thidixhi, is a nonconvex uniform polychoron that consists of 600 tetrahedra, 120 truncated dodecahedra, 600 cuboctahedra, and 120 small rhombidodecahedra. One tetrahedron, three truncated dodecahedra, three cuboctahedra, and three small rhombidodecahedra join at each vertex.

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