A

polyhedron with 12

faces, each of which is a

rhombus. The

dual polyhedron to the

cuboctahedron;
at eight of its

vertices 3 of the

obtuse angles of different rhombi meet; at the other six vertices, 4 of the

acute angles meet.

The rhombi that form this polyhedron have the following relative dimensions:

- edge length: sqrt(3)
- short diagonal: 2
- long diagonal: 2 sqrt(2)
- acute angle: cos
^{-1}(1/3), approx. 70.53 degrees.