Triangular duoprism

The triangular duoprism or triddip, also known as the triangular-triangular duoprism, the 3 duoprism or the 3-3 duoprism, is a noble uniform duoprism that consists of 6 triangular prisms, with 4 meeting at each vertex. It is the simplest possible duoprism (excluding the degenerate dichora) and is also the 6-2 gyrochoron. The triangular duoprism, along with its dual, is the first in a series of triangular dihedral swirlchora.

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