Decagrammic prism

The decagrammic prism, or stiddip, is a prismatic uniform polyhedron. It consists of 2 decagrams and 10 squares. Each vertex joins one decagram and two squares. As the name suggests, it is a prism based on a decagram.

Vertex coordinates
A decagrammic prism of edge length 1 has vertex coordinates given by:
 * $$\left(±\frac12,\,±\frac{\sqrt{5-2\sqrt5}}{2},\,±\frac12\right),$$
 * $$\left(±\frac{3+\sqrt5}{4},\,±\sqrt{\frac{5-\sqrt5}{8}},\,±\frac12\right),$$
 * $$\left(±\frac{\sqrt5-1}{2},\,0,\,±\frac12\right).$$

Representations
A decagrammic prism has the following Coxeter diagrams:


 * x x10/3o (full symmetry)
 * x x5/3x (base with H2 symmetry)

Related polyhedra
The great rhombisnub dodecahedron is a uniform polyhedron compound composed of 6 decagrammic prisms.