Small hendecagrammic-great hendecagrammic duoprism

The small hendecagrammic-great hendecagrammic duoprism, also known as the 11/2-11/4 duoprism, is a uniform duoprism that consists of 11 small hendecagrammic prisms and 11 great hendecagrammic prisms, with 2 of each at each vertex.

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