Pentagrammic prism

The pentagrammic prism, or stip, is a prismatic uniform polyhedron. It consists of 2 pentagrams and 5 squares. Each vertex joins one pentagram and two squares. As the name suggests, it is a prism based on a pentagram.

Vertex coordinates
A pentagrammic prism of edge length 1 has vertex coordinates given by:
 * (±1/2, –$\sqrt{(15–2√5)/20}$, ±1/2),
 * (±($\sqrt{25–10√5}$–1)/4, $\sqrt{5}$, ±1/2),
 * (0, –$\sqrt{2}$, ±1/2).

Related polyhedra
Two non-prismatic uniform polyhedron compounds are composed of pentagrammic prisms:


 * Great chirorhombidodecahedron (6)
 * Great disrhombidodecahedron (12)

There are also an infinite amount of prismatic uniform compounds that are the prisms of compounds of pentagrams.