|Bowers style acronym||Henadet|
|Cells||121+121 tetragonal disphenoids, 242 rectangular pyramids, 22 hendecagonal prisms|
|Faces||484+484 isosceles triangles, 242 rectangles, 22 hendecagons|
|Vertex figure||Biaugmented triangular prism|
|Measures (based on same duoprisms as optimized hendecagonal ditetragoltriate)|
|Edge lengths||Edges of smaller hendecagon (242): 1|
|Lacing edges (484):|
|Edges of larger hendecagon (242):|
|Abstract & topological properties|
|Symmetry||I2(11)≀S2, order 968|
The hendecagonal antiditetragoltriate or henadet is a convex isogonal polychoron and the ninth member of the antiditetragoltriate family. It consists of 22 hendecagonal prisms, 242 rectangular pyramids, and 242 tetragonal disphenoids of two kinds. 2 hendecagonal prisms, 4 tetragonal disphenoids, and 5 rectangular pyramids join at each vertex. However, it cannot be made scaliform.
It can be formed as the convex hull of 2 oppositely oriented semi-uniform hendecagonal duoprisms where the larger hendecagon is more than times the edge length of the smaller one.