Triangular-octagrammic duoprism

The triangular-octagrammic duoprism, also known as tistodip or 3-8/3 duoprism, is a uniform duoprism that consists of 8 triangular prism s and 3 octagrammic prism s, with 2 of each meeting at each vertex.

Coordinates
The coordinates of a triangular-octagrammic duoprism, centered at the origin and with unit edge length, are given by:


 * (0, √3/3, ±(√2–1)/2, ±1/2),
 * (0, √3/3, ±1/2, ±(√2–1)/2),
 * (±1/2, –√3/6, ±1/2, ±(√2–1)/2)
 * (±1/2, –√3/6, ±(√2–1)/2, ±1/2).