Tetrahedral duoprism

The tetrahedral duoprism or tetdip is a convex uniform duoprism that consists of 8 triangular-tetrahedral duoprisms as facets. 6 facets join at each vertex. It is the prism product of two tetrahedra. It is also the 8-2-3 gyropeton.

The tetrahedral duoprism can be vertex-inscribed into a demihexeract.

Vertex coordinates
The vertices of a tetrahedral duoprism of edge length 1 are given by all even sign changes in the first and the last three coordinates of:
 * $$\left(\frac{\sqrt2}{4},\,\frac{\sqrt2}{4},\,\frac{\sqrt2}{4},\,\frac{\sqrt2}{4},\,\frac{\sqrt2}{4},\,\frac{\sqrt2}{4}\right).$$