Square-grand hendecagrammic duoprism

The square-grand hendecagrammic duoprism, also known as the 4-11/5 duoprism, is a uniform duoprism that consists of 11 cubes and 4 grand hendecagrammic prisms, with 2 of each meeting at each vertex.

Vertex coordinates
The vertex coordinates of a square-grand hendecagrammic duoprism, centered at the origin and with edge length 2sin(5π/11), are given by:
 * (±sin(5π/11), ±sin(5π/11), 1, 0),
 * (±sin(5π/11), ±sin(5π/11), cos(2π/11), ±sin(2π/11)),
 * (±sin(5π/11), ±sin(5π/11), cos(4π/11), ±sin(4π/11)),
 * (±sin(5π/11), ±sin(5π/11), cos(6π/11), ±sin(6π/11)),
 * (±sin(5π/11), ±sin(5π/11), cos(8π/11), ±sin(8π/11)),
 * (±sin(5π/11), ±sin(5π/11), cos(10π/11), ±sin(10π/11)).