Hendecagonal-small hendecagrammic duoprism

The hendecagonal-small hendecagrammic duoprism, also known as the 11-11/2 duoprism, is a uniform duoprism that consists of 11 hendecagonal prisms and 11 small hendecagrammic prisms, with 2 of each at each vertex.

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