The gyroelongated square pyramid is a square pyramid with a square antiprism connected to the square base.
2.
The snub disphenoid can also constructed from the square antiprism by replacing the two square faces by pairs of equilateral triangles.
3.
:Note that the square antiprism is also a minimum energy configuration even though a cube would give all the angles equal.
4.
Adjoining a triangular prism to a square antiprism also generates a polyhedron, but has adjacent parallel faces, so is not a Johnson solid.
5.
As the name suggests, it can be constructed by gyroelongating an octahedron ( square bipyramid ) by inserting a square antiprism between its congruent halves.
6.
Zirconium, hafnium, plus many of the actinides form tetrafluorides with an ionic structure that puts the metal cation in an 8-coordinate square antiprism.
7.
The snub square antiprism ( " J " 85 ) can be seen as a square antiprism with a chain of equilateral triangles inserted around the middle.
8.
The snub square antiprism ( " J " 85 ) can be seen as a square antiprism with a chain of equilateral triangles inserted around the middle.
9.
The snub disphenoid ( " J " 84 ) is another deltahedron, constructed by replacing the two squares of a square antiprism by pairs of equilateral triangles.
10.
In this respect, it can be seen as a " capped " square antiprism ( a square antiprism with a pyramid erected on one of the square faces ).
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