Digonal antiprismatic symmetry

BC2×A1/2, also known as dappic symmetry or digonal antiprismatic symmetry, is a 3D spherical Coxeter 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.

Subgroups

 * BC2+×A1/2
 * A1×A1×A1+
 * A1×A1×I
 * A1×A1+×I
 * A1×I×I
 * I×I×I

Convex polytopes with BC2×A1/2 symmetry

 * Tetragonal disphenoid (noble)
 * Rectangular trapezoprism (isogonal)/Digonal scalenohedron (isotopic)