Octagonal-hendecagonal duoprism

The octagonal-hendecagonal duoprism or ohendip, also known as the 8-11 duoprism, is a uniform duoprism that consists of 8 hendecagonal prisms and 11 octagonal prisms, with two of each joining at each vertex.

Vertex coordinates
The coordinates of an octagonal-hendecagonal duoprism, centered at the origin and with edge length 2sin(π/11), are given by:
 * (±sin(π/11)(1+$\sqrt{2+√2}$), ±sin(π/11), 1, 0),
 * (±sin(π/11)(1+$\sqrt{2}$), ±sin(π/11), cos(2π/11), ±sin(2π/11)),
 * (±sin(π/11)(1+$\sqrt{2}$), ±sin(π/11), cos(4π/11), ±sin(4π/11)),
 * (±sin(π/11)(1+$\sqrt{2}$), ±sin(π/11), cos(6π/11), ±sin(6π/11)),
 * (±sin(π/11)(1+$\sqrt{2}$), ±sin(π/11), cos(8π/11), ±sin(8π/11)),
 * (±sin(π/11)(1+$\sqrt{2}$), ±sin(π/11), cos(10π/11), ±sin(10π/11)),
 * (±sin(π/11), ±sin(π/11)(1+$\sqrt{2}$), 1, 0),
 * (±sin(π/11), ±sin(π/11)(1+$\sqrt{2}$), cos(2π/11), ±sin(2π/11)),
 * (±sin(π/11), ±sin(π/11)(1+$\sqrt{2}$), cos(4π/11), ±sin(4π/11)),
 * (±sin(π/11), ±sin(π/11)(1+$\sqrt{2}$), cos(6π/11), ±sin(6π/11)),
 * (±sin(π/11), ±sin(π/11)(1+$\sqrt{2}$), cos(8π/11), ±sin(8π/11)),
 * (±sin(π/11), ±sin(π/11)(1+$\sqrt{2}$), cos(10π/11), ±sin(10π/11)).

Representations
An octagonal-hendecagonal duoprism has the following Coxeter diagrams:


 * x8o x11o (full ysmmetry)
 * x4x x11o (octagons as ditetragons)