Triangular truncatoprismantiprismoid

The triangular truncatoprismantiprismoid is a convex isogonal polychoron and the second member of the truncatoprismantiprismoids that consists of 12 ditrigonal prisms, 12 ditrigonal trapezoprisms and 18 rectangular trapezoprisms. However, it cannot be made uniform.

This polychoron can be alternated into a snub triangular prismantiprismoid, which is also nonuniform.

Using the ratio method, the lowest possible ratio between the longest and shortest edges is 1:$$\frac{2+\sqrt6}{2}$$ ≈ 1:2.22474.

Vertex coordinates
The vertices of a triangular truncatoprismantiprismoid, assuming that the trapezoids have three equal edges of length 1, centered at the origin, are given by the Cartesian products of two identical ditrigons of length 1 and (2+$\sqrt{6}$)/2 along with their central inversions.