Pu3Si2 crystallizes in the tetragonal P4/mbm space group. There are two inequivalent Pu sites. In the first Pu site, Pu(1) is bonded in a square co-planar geometry to four equivalent Si(1) atoms. In the second Pu site, Pu(2) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to two equivalent Pu(1), six equivalent Pu(2), and one Si(1) atom.
Pu3Si2 crystallizes in the tetragonal P4/mbm space group. There are two inequivalent Pu sites. In the first Pu site, Pu(1) is bonded in a square co-planar geometry to four equivalent Si(1) atoms. All Pu(1)-Si(1) bond lengths are 2.90 Å. In the second Pu site, Pu(2) is bonded in a 6-coordinate geometry to six equivalent Si(1) atoms. There are two shorter (2.90 Å) and four longer (3.00 Å) Pu(2)-Si(1) bond lengths. Si(1) is bonded in a 9-coordinate geometry to two equivalent Pu(1), six equivalent Pu(2), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.38 Å.