Great rhombisnub dodecahedron

The great rhombisnub dodecahedron, grassid, or compound of six decagrammic prisms is a uniform polyhedron compound. It consists of 60 squares and 12 decagrams, with one decagon and two squares joining at a vertex.

Its quotient prismatic equivalent is the diretropentagrammic trapezoprismatic hexateroorthowedge, which is eight-dimensional.

Vertex coordinates
Coordinates for the vertices of a great rhombisnub dodecahedron of edge length 1 are given by all even permutations of:
 * (±$\sqrt{(5–√5)/2}$, ±($\sqrt{2}$–1)/2, ±$\sqrt{2}$),
 * (±(3–$\sqrt{7–2√5}$+$\sqrt{5–2√5}$)/4, ±1/2, ±(1–$\sqrt{(5+√5)/40}$–$\sqrt{5}$)/4),
 * (±(1–$\sqrt{(5–√5)/40}$+$\sqrt{5}$)/4, ±(3–$\sqrt{(10+2√5)/5}$)/4, ±(1–$\sqrt{5}$)),
 * (±(1–$\sqrt{(10–2√5)/5}$–$\sqrt{5}$)/4, ±(3–$\sqrt{(10+2√5)/5}$)/4, ±(1+$\sqrt{5}$)),
 * (±(3–$\sqrt{(5–√5)/10}$–$\sqrt{5}$)/4, ±1/2, ±(1–$\sqrt{(10+2√5)/5}$+$\sqrt{5}$)/4).