Enneagonal-hendecagonal duoprismatic prism

The enneagonal-hendecagonal duoprismatic prism or ehenip, also known as the enneagonal-hendecagonal prismatic duoprism, is a convex uniform duoprism that consists of 2 enneagonal-hendecagonal duoprisms, 9 square-hendecagonal duoprisms and 11 square-enneagonal duoprisms. Each vertex joins 2 square-enneagonal duoprisms, 2 square-hendecagonal duoprisms, and 1 enneagonal-hendecagonal duoprism. Being a prism based on an orbiform polytope, it is also a convex segmentoteron.

Vertex coordinates
The vertices of an enneagonal-hendecagonal duoprismatic prism of edge length 4sin(π/9)sin(π/11) are given by: where j = 2, 4, 8 and k = 2, 4, 6, 8, 10.
 * $$\left(2\sin\frac\pi{11},\,0,\,2\sin\frac\pi9,\,0,\,±2\sin\frac\pi9\sin\frac\pi{11}\right),$$
 * $$\left(2\sin\frac\pi{11},\,0,\,2\cos\left(\frac{k\pi}{11}\right)\sin\frac\pi9,\,±2\sin\left(\frac{k\pi}{11}\right)\sin\frac\pi9,\,±2\sin\frac\pi9\sin\frac\pi{11}\right),$$
 * $$\left(2\cos\left(\frac{j\pi}9\right)\sin\frac\pi{11},\,±2\sin\left(\frac{j\pi}9\right)\sin\frac\pi{11},\,2\sin\frac\pi9,\,0,\,±2\sin\frac\pi9\sin\frac\pi{11}\right),$$
 * $$\left(2\cos\left(\frac{j\pi}9\right)\sin\frac\pi{11},\,±2\sin\left(\frac{j\pi}9\right)\sin\frac\pi{11},\,2\cos\left(\frac{k\pi}{11}\right)\sin\frac\pi9,\,±2\sin\left(\frac{k\pi}{11}\right)\sin\frac\pi9,\,±2\sin\frac\pi9\sin\frac\pi{11}\right),$$
 * $$\left(-\sin\frac\pi{11},\,±\sqrt3\sin\frac\pi{11},\,2\sin\frac\pi9,\,0,\,±2\sin\frac\pi9\sin\frac\pi{11}\right),$$
 * $$\left(-\sin\frac\pi{11},\,±\sqrt3\sin\frac\pi{11},\,2\cos\left(\frac{k\pi}{11}\right)\sin\frac\pi9,\,±2\sin\left(\frac{k\pi}{11}\right)\sin\frac\pi9,\,±2\sin\frac\pi9\sin\frac\pi{11}\right),$$

Representations
An enneagonal-hendecagonal duoprismatic prism has the following Coxeter diagrams:
 * x x9o x11o (full symmetry)
 * xx9oo xx11oo&#x (enneagonal-hendecagonal duoprism atop enneagonal-hendecagonal duoprism)