Octagonal duoexpandoprism

The heptagonal duoexpandoprism is a convex isogonal polychoron and the sixth member of the duoexpandoprisms that consists of 32 octagonal prisms of two kinds, 64 cuboids, 128 wedges and 64 tetragonal disphenoids obtained as the convex hull of two orthogonal 8-16 duoprisms. However, it cannot be made uniform.