Heptagonal retroprism

The heptagonal retroprism, also called the heptagonal crossed antiprism, is a prismatic isogonal polyhedron. It consists of 2 base heptagons and 14 isosceles triangles. Each vertex joins one heptagon and three triangles. It is a crossed antiprism based on a heptagon, seen as a 7/6-gon rather than 7/1. 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 heptagons.