Heptagonal-hendecagonal duoprism

The heptagonal-hendecagonal duoprism or hehendip, also known as the 7-11 duoprism, is a uniform duoprism that consists of 7 hendecagonal prisms and 11 heptagonal prisms, with two of each joining at each vertex.

Vertex coordinates
The coordinates of a heptagonal-hendecagonal duoprism, centered at the origin and with edge length 4sin(π/7)sin(π/11), are given by: where j = 2, 4, 6, 8, 10 and k = 2, 4, 6.
 * $$\left(2\sin\frac\pi{11},0,2\sin\frac\pi7,0\right),$$
 * $$\left(2\sin\frac\pi{11},0,2\sin\frac\pi7\cos\left(\frac{j\pi}{11}\right),±2\sin\frac\pi7\sin\left(\frac{j\pi}{11}\right)\right),$$
 * $$\left(2\sin\frac\pi{11}\cos\left(\frac{k\pi}7\right),±2\sin\frac\pi{11}\sin\left(\frac{k\pi}7\right),2\sin\frac\pi7,0\right),$$
 * $$\left(2\sin\frac\pi{11}\cos\left(\frac{k\pi}7\right),±2\sin\frac\pi{11}\sin\left(\frac{k\pi}7\right),2\sin\frac\pi7\cos\left(\frac{j\pi}{11}\right),±2\sin\frac\pi7\sin\left(\frac{j\pi}{11}\right)\right),$$