Expanded cuboctahedron

3D Model

https://en.wikipedia.org/wiki/Expanded_cuboctahedron

Other names

Expanded rhombic dodecahedron / Rectified rhombicuboctahedron / Rectified small rhombicuboctahedron / Rhombirhombicuboctahedron

NOTE: There is a similar polyhedron constructed with conway’s expand operator to rhombic dodecahedron https://sketchfab.com/models/389ae706f2814da3a4b4b7d28e9b7c98.

There are several ways to construct this shape.

http://www.georgehart.com/virtual-polyhedra/zonish_polyhedra.html

http://www.orchidpalms.com/polyhedra/rhombic/RD/RD.htm#XRD

The model is based on George Hart’s.