Heptagonal duotransitionalterprism

The heptagonal duotransitionalterprism is a convex isogonal polychoron and the fifth member of the duotransitionalterprism family. It consists of 14 heptagonal trapezorhombihedra, 14 heptagonal prisms, and 49 rectangular trapezoprisms. 2 heptagonal trapezorhombihedra, 1 heptagoal prism, and 2 rectangular trapezoprisms join at each vertex. It can be obtained as the convex hull of two orthogonal heptagonal-tetradecagonal duoprisms. However, it cannot be made scaliform.