Heptagrammic retroprism

The heptagonal retroprism, also called the heptagrammic crossed antiprism, is a prismatic isogonal polyhedron. It consists of 2 base heptagrams and 14 isosceles triangles. Each vertex joins one heptagram and three triangles. It is a crossed antiprism based on a heptagram, seen as a 7/5-gon rather than 7/2. It cannot be made uniform.

It is isomorphic to the heptagonal antiprism.

Related polyhedra
There are an infinite amount of prismatic isogonal compounds that are the crossed antiprisms of compounds of heptagrams.