Hendecagonal-dodecagonal duoprism

The hendecagonal-dodecagonal duoprism or hentwadip, also known as the 11-12 duoprism, is a uniform duoprism that consists of 11 dodecagonal prisms and 12 hendecagonal prisms, with two of each joining at each vertex.

Vertex coordinates
The coordinates of a hendecagonal-dodecagonal duoprism, centered at the origin and with edge length 2sin(π/11), are given by: where j = 2, 4, 6, 8, 10.
 * $$\left(1,0,±\left(1+\sqrt3\right)\sin\frac\pi{11},±\left(1+\sqrt3\right)\sin\frac\pi{11}\right),$$
 * $$\left(1,0,±\sin\frac\pi{11},±\left(2+\sqrt3\right)\sin\frac\pi{11}\right),$$
 * $$\left(1,0,±\left(2+\sqrt3\right)\sin\frac\pi{11},±\sin\frac\pi{11}\right),$$
 * $$\left(\cos\left(\frac{j\pi}{11}\right),±\sin\left(\frac{j\pi}{11}\right),±\left(1+\sqrt3\right)\sin\frac\pi{11},±\left(1+\sqrt3\right)\sin\frac\pi{11}\right),$$
 * $$\left(\cos\left(\frac{j\pi}{11}\right),±\sin\left(\frac{j\pi}{11}\right),±\sin\frac\pi{11},±\left(2+\sqrt3\right)\sin\frac\pi{11}\right),$$
 * $$\left(\cos\left(\frac{j\pi}{11}\right),±\sin\left(\frac{j\pi}{11}\right),±\left(2+\sqrt3\right)\sin\frac\pi{11},±\sin\frac\pi{11}\right),$$

Representations
A hendecagonal-dodecagonal duoprism has the following Coxeter diagrams:
 * x11o x12o (full symmetry)
 * x6x x11o (dodecagons as dihexagons)