Rhombitetratetrahedron

The small rhombitetratetrahedron, or sratet, is a convex semi-unifrom polyhedron that is a tetrahedral-symmetric variant of the cuboctahedron. It has 2 sets of 4 triangles of generally different sizes, with 6 rectangles connecting them. Half of the edges are of each size.

A small rhombitetratetrahedron is the vertex figure of one uniform polychoron, the grand ditetrahedronary hexacosidishecatonicosachoron.

Vertex coordinates
A small rhombitetratetrahedron with edge lengths a and b has vertices given by all permutations and even sign changes of:


 * $$\left((a+b)\frac{\sqrt2}{4},\,(a+b)\frac{\sqrt2}{4},\,(a-b)\frac{\sqrt2}{4}\right).$$