Tetrahedral duoprism

The tetrahedral duoprism or tetdip is a convex uniform duoprism that consists of 8 triangular-tetrahedral duoprisms.

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:
 * ($\sqrt{3}$/4, $\sqrt{2}$/4, $\sqrt{2}$/4, $\sqrt{2}$/4, $\sqrt{2}$/4, $\sqrt{2}$/4).