24-7 step prism

The digonal double triswirlprism is a convex isogonal polychoron that consists of 24 rhombic disphenoids of two kinds, 48 phyllic disphenoids of two kinds and 48 irregular tetrahedra obtained as the convex hull of two orthogonal digonal-digonal triswirlprisms. However, it cannot be made uniform. Together with its dual, it is the third in an infinite family of digonal antiprismatic swirlchora.

Vertex coordinates
Vertex coordinates for a digonal double triswirlprism, assuming that the edge length differences are minimized, centered at the origin, are given by all sign changes of: along with all even sign changes of:
 * (0, 1/2, 0, $\sqrt{3}$/2),
 * (0, $\sqrt{3}$/2, 0, 1/2),
 * ($\sqrt{3}$/4, 1/4, 3/4, $\sqrt{3}$/4),
 * (3/4, $\sqrt{3}$/4, $\sqrt{3}$/4, 1/4).