Rectified small ditrigonary hexacosihecatonicosachoron

The rectified small ditrigonary hexacosihecatonicosachoron, or rissidtixhi, is a nonconvex uniform polychoron that consists of 600 regular octahedra, 120 small ditrigonary icosidodecahedra, and 120 great icosidodecahedra. 2 small ditrigonary icosidodecahedra, 3 great icosidodecahedra, and 3 octahedra join at each ditrigonal prismatic vertex. As the name suggests, it can be obtained by rectifying the small ditrigonary hexacosihecatonicosachoron.

Vertex coordinates
The vertices of a rectified small ditrigonary hexacosihecatonicosachoron of edge length 1 are given by all permutations of: along with all even permutations of:
 * (0, 0, ±($\sqrt{5}$–1)/2, ±(1+$\sqrt{3}$)/2),
 * (0, ±1, ±1, ±1),
 * (±1/2, ±1/2, ±1/2, ±3/2),
 * (±1/2, ±1/2, ±$\sqrt{5}$/2, ±$\sqrt{7+3√5}$/2),


 * (0, ±(3–$\sqrt{10}$)/4, ±(3+$\sqrt{5}$)/4, ±$\sqrt{5}$/2),
 * (0, ±($\sqrt{5}$–1)/4, ±3/2, ±(1+$\sqrt{5}$)/4),
 * (±(3–$\sqrt{5}$)/4, ±($\sqrt{5}$–1)/4, ±(1+$\sqrt{5}$)/2, ±1/2),
 * (±(3–$\sqrt{5}$)/4, ±1/2, ±(3+$\sqrt{5}$)/4, ±1),
 * (±($\sqrt{5}$–1)/4, ±(1+$\sqrt{5}$)/4, ±$\sqrt{5}$/2, ±1/2),
 * (±1/2, ±($\sqrt{5}$–1)/2, ±(3+$\sqrt{5}$)/4, ±(1+$\sqrt{5}$)/4).