The polyhedron is obtained based on the mathematical expansion (for more detail, No. 21 of the Magic Edges).
A small rhombicuboctahedron is a semiregular convex polyhedron with two properties:
1. All faces are regular polygons of two types - triangle and square;
2. For any pair of vertices, there is a symmetry of the polyhedron (that is, a motion that translates the polyhedron into itself) that transforms one vertex to another.
Archimedean solids are semiregular polyhedra because their faces are regular polygons. Still, they are not the same, while the condition of one of the types of spatial symmetry (tetrahedral, octahedral or icosahedral) is preserved.