Octagonal-hendecagrammic duoprism

The octagonal-hendecagrammic duoprism, also known as the 8/11-3 duoprism, is a uniform duoprism that consists of 11 octagonal prisms and 8 hendecagrammic prisms, with 2 of each meeting at each vertex.

The name can also refer to the octagonal-small hendecagrammic duoprism, octagonal-great hendecagrammic duoprism, or octagonal-grand hendecagrammic duoprism.

Vertex coordinates
The coordinates of an octagonal-hendecagrammic duoprism, centered at the origin and with edge length 2sin(3π/11), are given by:
 * (±sin(3π/11)(1+$\sqrt{2+√2}$), ±sin(3π/11), 1, 0),
 * (±sin(3π/11)(1+$\sqrt{2}$), ±sin(3π/11), cos(2π/11), ±sin(2π/11)),
 * (±sin(3π/11)(1+$\sqrt{2}$), ±sin(3π/11), cos(4π/11), ±sin(4π/11)),
 * (±sin(3π/11)(1+$\sqrt{2}$), ±sin(3π/11), cos(6π/11), ±sin(6π/11)),
 * (±sin(3π/11)(1+$\sqrt{2}$), ±sin(3π/11), cos(8π/11), ±sin(8π/11)),
 * (±sin(3π/11)(1+$\sqrt{2}$), ±sin(3π/11), cos(10π/11), ±sin(10π/11))
 * (±sin(3π/11), ±sin(3π/11)(1+$\sqrt{2}$), 1, 0),
 * (±sin(3π/11), ±sin(3π/11)(1+$\sqrt{2}$), cos(2π/11), ±sin(2π/11)),
 * (±sin(3π/11), ±sin(3π/11)(1+$\sqrt{2}$), cos(4π/11), ±sin(4π/11)),
 * (±sin(3π/11), ±sin(3π/11)(1+$\sqrt{2}$), cos(6π/11), ±sin(6π/11)),
 * (±sin(3π/11), ±sin(3π/11)(1+$\sqrt{2}$), cos(8π/11), ±sin(8π/11)),
 * (±sin(3π/11), ±sin(3π/11)(1+$\sqrt{2}$), cos(10π/11), ±sin(10π/11)).