Heptagonal duotransitionaltertegum

The heptagonal duotransitionaltertegum is a convex isochoric polychoron and member of the duotruncatoaltertegum family with 196 kite pyramids as cells.

Each cell of this polychoron has mirror symmetry, with 1 kite, 2 isosceles triangles, and 2 scalene triangles for faces.