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PuRh3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Pu is bonded to twelve equivalent Rh atoms to form a mixture of face and corner-sharing PuRh12 cuboctahedra. All Pu–Rh bond lengths are 2.83 Å. Rh is bonded in a distorted square co-planar geometry to four equivalent Pu atoms.
PuRh2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Pu is bonded in a 12-coordinate geometry to twelve equivalent Rh atoms. All Pu–Rh bond lengths are 3.07 Å. Rh is bonded to six equivalent Pu and six equivalent Rh atoms to form a mixture of edge, face, and corner-sharing RhPu6Rh6 cuboctahedra. All Rh–Rh bond lengths are 2.62 Å.
Pu5Rh3 crystallizes in the tetragonal P4/ncc space group. The structure is three-dimensional. there are two inequivalent Pu sites. In the first Pu site, Pu is bonded in a 4-coordinate geometry to four equivalent Rh atoms. All Pu–Rh bond lengths are 2.94 Å. In the second Pu site, Pu is bonded in a 6-coordinate geometry to six Rh atoms. There are a spread of Pu–Rh bond distances ranging from 2.87–3.22 Å. There are two inequivalent Rh sites. In the first Rh site, Rh is bonded in a 10-coordinate geometry to ten Pu atoms. In the second Rh site, Rh is bonded in a 10-coordinate geometry to eight equivalent Pu and two equivalent Rh atoms. Both Rh–Rh bond lengths are 2.80 Å.
Pu4Rh is Iron carbide-like structured and crystallizes in the cubic Fd-3m space group. The structure is zero-dimensional and consists of eight Pu4Rh clusters. Pu is bonded in a single-bond geometry to one Rh atom. The Pu–Rh bond length is 2.57 Å. Rh is bonded in a tetrahedral geometry to four equivalent Pu atoms.