It may be broken down into an antiprism and a crown of toric appearance that surrounds it.

9-sided antiprism (2 sets of 9 sides + 2 ends = 20).

They discovered the grand antiprism in the process, the only non-Wythoffian uniform polychoron.

A uniform antiprism has, apart from the base faces, 2n equilateral triangles as faces.

They discovered the grand antiprism in the process, the only non-Wythoffian uniform polychoron.

The antihermaphrodites are assemblings of a half antiprism and a half antidiamond.

A uniform antiprism has, apart from the base faces, 2n equilateral triangles as faces.

The total coordination number is 10, with the lead ion in a bicapped square antiprism molecular geometry.

The n-gonal trapezohedron, antidipyramid or deltohedron is the dual polyhedron of a regular n-gonal antiprism. ...

A similar effect can be achieved with a triangular antiprism (which is an octahedron), resulting in an icosahedron.

The n-gonal trapezohedron, antidipyramid, antibipyramid or deltohedron is the dual polyhedron of an n-gonal antiprism.

An antiprism with p/q < 2 is crossed or retrograde; its vertex figure resembles a bowtie.

The n-gonal trapezohedron, antibipyramid or deltohedron is the dual polyhedron of an n-gonal antiprism.

It can be thought of as a square antiprism with a chain of triangles inserted around the middle.

An antiprism with p/q < 2 is crossed or retrograde; its vertex figure resembles a bowtie.