Square-hendecagonal duoprism

The square-hendecagonal duoprism or shendip, also known as the 4-11 duoprism, is a uniform duoprism that consists of 4 hendecagonal prisms and 11 cubes, with two of each joining at each vertex. It is also a convex segmentochoron, being the prism of the hendecagonal prism.

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

Representations
A square-hendecagonal duoprism has the following Coxeter diagrams:
 * x4o x11o (full symmetry)
 * x x x11o (squares as rectangles)