Square-small rhombicuboctahedral duoprism

The square-small rhombicuboctahedral duoprism or squasirco is a convex uniform duoprism that consists of 4 small rhombicuboctahedral prisms, 18 tesseracts of two kinds and 8 triangular-square duoprisms.

The square-small rhombicuboctahedral duoprism can be vertex-inscribed into a small cellated penteract.

This polychoron can be tetrahedrally alternated into a digonal-truncated tetrahedral duocupoliprism, which is scaliform.

Vertex coordinates
The vertices of a square-small rhombicuboctahedral 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, ±(1+$\sqrt{7+2√2}$)/2)