Fig. 987.326 Stellated Rhombic Dodecahedron:
 Rhombic dodecahedron with diamond faces subdivided
into quadrants to describe midface centers.
Interior lines with arrows show unit radii from system
center to midface centers. This is the initial
rhombic dodeca of tetravolume6.
 The rhombic dodecahedron system is "pumped out" with
radii doubled from unit radius to radius =
2, or twice prime vector radius . This produces the
stellated rhombic dodecahedron of tetravolume
12.
 The stellated rhombic dodecahedron vertexes are congruent
with the midedge points of the cube of
tetravolume24. A composite of three twofrequency Couplers
(each individually of tetravolume8)
altogether comprises a star complex of tetravolume12,
sharing a common central rhombic dodeca
domain of tetravolume6. The stellated rhombic dodeca
of tetravolume12 is half the volume of the
24tetravolume cube that inscribes it. (Compare the
DuoTet Cube at Fig.
987.242A.)
