Enneagonal duotruncatoalterprism

The enneagonal duotruncatoalterprism is a convex isogonal polychoron and the seventh member of the duotruncatoalterprisms that consists of 18 enneagonal prisms, 36 enneagonal cupolas, 81 rectangular trapezoprisms and 81 tetragonal disphenoids obtained as the convex hull of two orthogonal enneagonal-octadecagonal duoprisms. However, it cannot be made scaliform.