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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.
Pu5Rh4 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are three inequivalent Pu sites. In the first Pu site, Pu is bonded in a 7-coordinate geometry to seven Rh atoms. There are a spread of Pu–Rh bond distances ranging from 2.79–3.12 Å. In the second Pu site, Pu is bonded in a 7-coordinate geometry to one Pu and six Rh atoms. The Pu–Pu bond length is 2.57 Å. There are a spread of Pu–Rh bond distances ranging from 2.82–3.21 Å. In the third Pu site, Pu is bonded in a 8-coordinate geometry to two equivalent Pu and six Rh atoms. There are a spread of Pu–Rh bond distances ranging from 2.66–3.21 Å. There are three inequivalent Rh sites. In the first Rh site, Rh is bonded in a 10-coordinate geometry to eight Pu and two equivalent Rh atoms. There are one shorter (2.74 Å) and one longer (2.92 Å) Rh–Rh bond lengths. In the second Rh site, Rh is bonded in a 8-coordinate geometry to eight Pu atoms. In the third Rh site, Rh is bonded in a 4-coordinate geometry to eight Pu and two equivalent Rh atoms.
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.