Octagrammic-dodecagonal duoprism

The octagrammic-dodecagonal duoprism, also known as stotwadip or the 8/3-12 duoprism, is a uniform duoprism that consists of 12 octagrammic prisms and 8 dodecagonal prisms, with 2 of each at each vertex.

Vertex coordinates
The coordinates of an octagrammic-dodecagonal duoprism, centered at the origin and with unit edge length, are given by:
 * $$\left(±\frac12,\,±\frac{\sqrt2-1}{2},\,±\frac{1+\sqrt3}{2},\,±\frac{1+\sqrt3}{2}\right),$$
 * $$\left(±\frac12,\,±\frac{\sqrt2-1}{2},\,±\frac12,\,±\frac{2+\sqrt3}{2}\right),$$
 * $$\left(±\frac12,\,±\frac{\sqrt2-1}{2},\,±\frac{2+\sqrt3}{2},\,±\frac12\right),$$
 * $$\left(±\frac{\sqrt2-1}{2},\,±\frac12,\,±\frac{1+\sqrt3}{2},\,±\frac{1+\sqrt3}{2}\right),$$
 * $$\left(±\frac{\sqrt2-1}{2},\,±\frac12,\,±\frac12,\,±\frac{2+\sqrt3}{2}\right),$$
 * $$\left(±\frac{\sqrt2-1}{2},\,±\frac12,\,±\frac{2+\sqrt3}{2},\,±\frac12\right).$$

Representations
An octagrammic-dodecagonal duoprism has the following Coxeter diagrams:
 * x8/3o x12o (full symmetry)
 * x6x x8/3o (G2×I2(8) symmetry, dodecagons as dihexagons)