Square duoantiprismatic antiprism

The square duoantiprismatic antiprism is a convex isogonal polyteron that consists of 2 square duoantiprisms, 16 digonal-square duoantiprisms and 64 tetragonal disphenoidal pyramids obtained through the process of alternating the octagonal duoprismatic prism. However, it cannot be made uniform.

The ratio between the longest and shortest edges is 1:$$\sqrt{\frac{2+\sqrt2}{2}}$$ ≈ 1:1.30656.

Vertex coordinates
The vertices of a square duoantiprismatic antiprism, assuming that the edge length differences are minimized, centered at the origin, are given by:
 * (0, ±$\sqrt{2}$/2, 0, ±$\sqrt{2}$/2, $\sqrt{8|4}$/4),
 * (0, ±$\sqrt{2}$/2, ±$\sqrt{2}$/2, 0, $\sqrt{8|4}$/4),
 * (±$\sqrt{2}$/2, 0, 0, ±$\sqrt{2}$/2, $\sqrt{8|4}$/4),
 * (±$\sqrt{2}$/2, 0, ±$\sqrt{2}$/2, 0, $\sqrt{8|4}$/4),
 * (±1/2, ±1/2, ±1/2, ±1/2, $\sqrt{8|4}$/4),
 * (0, ±$\sqrt{2}$/2, ±1/2, ±1/2, -$\sqrt{8|4}$/4),
 * (±$\sqrt{2}$/2, 0, ±1/2, ±1/2, -$\sqrt{8|4}$/4),
 * (±1/2, ±1/2, 0, ±$\sqrt{2}$/2, -$\sqrt{8|4}$/4),
 * (±1/2, ±1/2, ±$\sqrt{2}$/2, 0, -$\sqrt{8|4}$/4).