Heptagonal duotruncatoalterprism

The heptagonal duotruncatoalterprism is a convex isogonal polychoron and the fifth member of the duotruncatoalterprisms that consists of 14 heptagonal prisms, 28 heptagonal cupolas, 49 rectangular trapezoprisms and 49 tetragonal disphenoids obtained as the convex hull of two orthogonal heptagonal-tetradecagonal duoprisms. However, it cannot be made scaliform.