Triamond antiprism 2,2

The  is a convex triamond polyhedron. It can be made by augmenting a square pyramid with two tetrahedra on opposite triangular faces and combining co-planar faces in the result, or as a section of the triangular cupola.

It has the fewest vertices, faces and edges of any known convex triamond polyhedron.

Related polytopes
The can be augmented with itself along its rhombic face to form another convex triamond polyhedron.

The can augment a triamond triangular cupola section to form the triangular cupola.