Enneagonal duotransitionalterprism

The enneagonal duotransitionalterprism is a convex isogonal polychoron and the seventh member of the duotransitionalterprisms that consists of 18 enneagonal trapezorhombihedra, 18 enneagonal prisms and 81 rectangular trapezoprisms obtained as the convex hull of two orthogonal enneagonal-octadecagonal duoprisms. However, it cannot be made scaliform.