Hexagonal duoprism

The 6-6 duoprism or simply the 6 duoprism, also known as hiddip, is a noble uniform duoprism that consists of 12 hexagonal prisms and 36 vertices. It is also the 12-5 gyrochoron and the third in a series of triangular dihedral swirlchora.

This polychoron can be alternated into a 3-3 duoantiprism, although it cannot be made uniform. The dodecagons can also be alternated into long rectangles to create a bialternatosnub 3-6 duoprism, which is also nonuniform.

Vertex coordinates
Coordinates for the vertices of a 6-6 duoprism of edge length 1, centered at the origin, are given by:
 * (0, ±1, 0, ±1),
 * (0, ±1, ±$\sqrt{3}$/2, ±1/2),
 * (±$\sqrt{3}$/2, ±1/2, 0, ±1),
 * (±$\sqrt{3}$/2, ±1/2, ±$\sqrt{3}$/2, ±1/2).