Prodigonal antiprismatic symmetry

Prodigonal antiprismatic symmetry
Rank	3
Space	Spherical
Order	4

Prodigonal antiprismatic symmetry, also known as prodappic symmetry and notated (B₂+×A₁)/2 or (BC₂+×A₁)/2, is a 3D spherical symmetry group. It is the symmetry group of the tetragonal disphenoid if the top and bottom edges are regarded as having chiral digonal rather tha full igonal symmetry.

Subgroups

• K₂+×I (maximal)
• I×I×I

Convex polytopes with (BC₂+×A₁)/2 symmetry

• Tetragonal disphenoid (noble)