Small rhombicuboctahedron atop truncated cube

Small rhombicuboctahedron atop truncated cube, or sircoatic, is a CRF segmentochoron (designated K-4.100 on Richard Klitzing's list). As the name suggests, it consists of a small rhombicuboctahedron and a truncated cube as bases, connected by 12 triangular prisms, 8 octahedra, and 6 square cupolas.

Two small rhombicuboctahedron atop truncated cube segmentochora can be attached to the bases of a truncated cubic prism to form a small rhombated tesseract, as the square cupolas of the caps fuse with the octagonal prisms of the truncated cubic prism to form futher small rhombicuboctahedra.

Vertex coordinates
The vertices of a small rhombicuboctahedron atop truncated cube segmentochoron of edge length 1 are given by:
 * (±(1+$\sqrt{2}$)/2, ±1/2, ±1/2, $\sqrt{2+√2}$/2) and all permutations of first rhree coordinates
 * (±(1+$\sqrt{2}$)/2, ±·1+$\sqrt{2+√2}$)/2, ±1/2, 0) and all permutations of first three coordinates