Octagrammic duoprism

The octagrammic duoprism or stodip, also known as the octagrammic-octagrammic duoprism, the 8/3 duoprism or the 8/3-8/3 duoprism, is a noble uniform duoprism that consists of 16 octagrammic prisms, with 4 meeting at each vertex.

The octagrammic duoprism can be vertex-inscribed into a sphenoverted tesseractitesseractihexadecachoron or great distetracontoctachoron.

Vertex coordinates
The vertices of an octagrammic duoprism, centered at the origin and with unit edge length, are given by:
 * $$\left(±\frac12,\,±\frac{\sqrt2-1}{2},\,±\frac12,\,±\frac{\sqrt2-1}{2}\right),$$
 * $$\left(±\frac12,\,±\frac{\sqrt2-1}{2},\,±\frac{\sqrt2-1}{2},\,±\frac12\right),$$
 * $$\left(±\frac{\sqrt2-1}{2},\,±\frac12,\,±\frac12,\,±\frac{\sqrt2-1}{2}\right),$$
 * $$\left(±\frac{\sqrt2-1}{2},\,±\frac12,\,±\frac{\sqrt2-1}{2},\,±\frac12\right).$$