PuMn2Si2 crystallizes in the tetragonal I4/mmm space group. Pu(1) is bonded in a 16-coordinate geometry to eight equivalent Mn(1) and eight equivalent Si(1) atoms. Mn(1) is bonded to four equivalent Pu(1) and four equivalent Si(1) atoms to form a mixture of face, corner, and edge-sharing MnPu4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent Pu(1), four equivalent Mn(1), and one Si(1) atom.
PuMn2Si2 crystallizes in the tetragonal I4/mmm space group. Pu(1) is bonded in a 16-coordinate geometry to eight equivalent Mn(1) and eight equivalent Si(1) atoms. All Pu(1)-Mn(1) bond lengths are 3.20 Å. All Pu(1)-Si(1) bond lengths are 2.96 Å. Mn(1) is bonded to four equivalent Pu(1) and four equivalent Si(1) atoms to form a mixture of face, corner, and edge-sharing MnPu4Si4 tetrahedra. All Mn(1)-Si(1) bond lengths are 2.36 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent Pu(1), four equivalent Mn(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.37 Å.