UPd2Si2 crystallizes in the tetragonal I4/mmm space group. U(1) is bonded in a 16-coordinate geometry to eight equivalent Pd(1) and eight equivalent Si(1) atoms. Pd(1) is bonded to four equivalent U(1) and four equivalent Si(1) atoms to form a mixture of distorted face, corner, and edge-sharing PdU4Si4 tetrahedra. Si(1) is bonded in a 9-coordinate geometry to four equivalent U(1), four equivalent Pd(1), and one Si(1) atom.
UPd2Si2 crystallizes in the tetragonal I4/mmm space group. U(1) is bonded in a 16-coordinate geometry to eight equivalent Pd(1) and eight equivalent Si(1) atoms. All U(1)-Pd(1) bond lengths are 3.29 Å. All U(1)-Si(1) bond lengths are 3.12 Å. Pd(1) is bonded to four equivalent U(1) and four equivalent Si(1) atoms to form a mixture of distorted face, corner, and edge-sharing PdU4Si4 tetrahedra. All Pd(1)-Si(1) bond lengths are 2.48 Å. Si(1) is bonded in a 9-coordinate geometry to four equivalent U(1), four equivalent Pd(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.35 Å.