Heptagrammic-dodecagonal duoprism

The heptagrammic-dodecagonal duoprism, also known as the 7/2-12 duoprism, is a uniform duoprism that consists of 12 heptagrammic prisms and 7 dodecagonal prisms, with 2 of each meeting at each vertex.

The name can also refer to the great heptagrammic-dodecagonal duoprism.

Vertex coordinates
The coordinates of a heptagrammic-dodecagonal duoprism, centered at the origin and with edge length 2sin(2π/7), are given by:
 * (1, 0, ±sin(2π/7)(1+$\sqrt{6}$), ±sin(2π/7)(1+$\sqrt{2}$)),
 * (1, 0, ±sin(2π/7), ±sin(2π/7)(2+$\sqrt{2}$)),
 * (1, 0, ±sin(2π/7)(2+$\sqrt{3}$), ±sin(2π/7)),
 * (cos(2π/7), ±sin(2π/7), ±sin(2π/7)(1+$\sqrt{3}$), ±sin(2π/7)(1+$\sqrt{3}$)),
 * (cos(2π/7), ±sin(2π/7), ±sin(2π/7), ±sin(2π/7)(2+$\sqrt{3}$)),
 * (cos(2π/7), ±sin(2π/7), ±sin(2π/7)(2+$\sqrt{3}$), ±sin(2π/7)),
 * (cos(4π/7), ±sin(4π/7), ±sin(2π/7)(1+$\sqrt{3}$), ±sin(2π/7)(1+$\sqrt{3}$)),
 * (cos(4π/7), ±sin(4π/7), ±sin(2π/7), ±sin(2π/7)(2+$\sqrt{3}$)),
 * (cos(4π/7), ±sin(4π/7), ±sin(2π/7)(2+$\sqrt{3}$), ±sin(2π/7)),
 * (cos(6π/7), ±sin(6π/7), ±sin(2π/7)(1+$\sqrt{3}$), ±sin(2π/7)(1+$\sqrt{3}$)),
 * (cos(6π/7), ±sin(6π/7), ±sin(2π/7), ±sin(2π/7)(2+$\sqrt{3}$)),
 * (cos(6π/7), ±sin(6π/7), ±sin(2π/7)(2+$\sqrt{3}$), ±sin(2π/7)).