Digonal antiprismatic symmetry
|Digonal antiprismatic symmetry|
Digonal antiprismatic symmetry, also known as dappic symmetry and notated (B2×A1)/2, is a 3D spherical symmetry group. It is the symmetry group of the tetragonal disphenoid and is the digonal member of the family of antiprismatic symmetries. It occurs as a subsymmetry of tetrahedral, octahedral, and icosahedral symmetries.