Square-square antiprismatic duoprism

The square-square antiprismatic duoprism or squasquap is a convex uniform duoprism that consists of 4 square antiprismatic prisms, 2 tesseracts and 8 triangular-square duoprisms.

Vertex coordinates
The vertices of a square-square antiprismatic duoprism of edge length 1 are given by all permutations and sign changes of the last three coordinates of:
 * (±1/2, ±1/2, ±1/2, ±1/2, $\sqrt{16+2√2}$/4)
 * (±1/2, ±1/2, 0, ±$\sqrt{2√2}$/2, -$\sqrt{2}$/4)
 * (±1/2, ±1/2, ±$\sqrt{2√2}$/2, 0, -$\sqrt{2}$/4)