Pu(RhSi)2 crystallizes in the tetragonal I4/mmm space group. Pu(1) is bonded in a 16-coordinate geometry to eight equivalent Rh(1) and eight equivalent Si(1) atoms. Rh(1) is bonded to four equivalent Pu(1) and four equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing RhPu4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Pu(1), four equivalent Rh(1), and one Si(1) atom.
Pu(RhSi)2 crystallizes in the tetragonal I4/mmm space group. Pu(1) is bonded in a 16-coordinate geometry to eight equivalent Rh(1) and eight equivalent Si(1) atoms. All Pu(1)-Rh(1) bond lengths are 3.23 Å. All Pu(1)-Si(1) bond lengths are 3.12 Å. Rh(1) is bonded to four equivalent Pu(1) and four equivalent Si(1) atoms to form a mixture of distorted edge, face, and corner-sharing RhPu4Si4 tetrahedra. All Rh(1)-Si(1) bond lengths are 2.40 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Pu(1), four equivalent Rh(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.48 Å.