Hendecagonal duoprismatic prism

The hendecagonal duoprismatic prism or henhenip, also known as the hendecagonal-hendecagonal prismatic duoprism, is a convex uniform duoprism that consists of 2 hendecagonal duoprisms and 22 square-hendecagonal duoprisms. Each vertex joins 4 square-hendecagonal duoprisms and 1 hendecagonal duoprism. Being a prism based on an orbiform polytope, it is also a convex segmentoteron.

Vertex coordinates
The vertices of a hendecagonal duoprismatic prism of edge length 2sin(π/11) are given by: where j, k = 2, 4, 6, 8, 10.
 * $$\left(1,\,0,\,1,\,0,\,±\sin\frac\pi{11}\right),$$
 * $$\left(\cos\frac{j\pi}{11},\,±\sin\frac{j\pi}{11},\,1,\,0,\,±\sin\frac\pi{11}\right),$$
 * $$\left(1,\,0,\,\cos\frac{k\pi}{11},\,±\sin\frac{k\pi}{11},\,±\sin\frac\pi{11}\right),$$
 * $$\left(\cos\frac{j\pi}{11},\,±\sin\frac{j\pi}{11},\,\cos\frac{k\pi}{11},\,±\sin\frac{k\pi}{11},\,±\sin\frac\pi{11}\right),$$

Representations
A hendecagonal duoprismatic prism has the following Coxeter diagrams:
 * x x11o x11o (full symmetry)
 * xx11oo xx11oo&#x (hendecagonal duoprism atop hendecagonal duoprism)