12-2 step prism

The 12-2 step prism is a convex isogonal polychoron and a member of the step prism family. It has 6 rhombic disphenoids and 48 phyllic disphenoids of four kinds as cells, with 18 (2 rhombic and 16 phyllic disphenoids) joining at each vertex. Together with its dual, it is the second in an infinite family of square dihedral swirlchora.

Vertex coordinates
Coordinates for the vertices of a 12-2 step prism inscribed in a dodecagonal duoprism with base lengths a and b are given by: where k is an integer from 0 to 11. If the edge length differences are to be minimized, the ratio of a:b must be equivalent to 1:$$\frac{\sqrt[4]{27}}{3}$$ ≈ 1:0.75984.
 * (a*sin(πk/6), a*cos(πk/6), b*sin(πk/3), b*cos(πk/3)),