UPdSe3 crystallizes in the orthorhombic Pnma space group. U(1) is bonded in a 8-coordinate geometry to two equivalent Se(2) and six equivalent Se(1) atoms. Pd(1) is bonded to two equivalent Se(2) and four equivalent Se(1) atoms to form distorted corner-sharing PdSe6 octahedra. The corner-sharing octahedral tilt angles range from 43-59°. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to three equivalent U(1) and two equivalent Pd(1) atoms. In the second Se site, Se(2) is bonded in a see-saw-like geometry to two equivalent U(1) and two equivalent Pd(1) atoms.
UPdSe3 crystallizes in the orthorhombic Pnma space group. U(1) is bonded in a 8-coordinate geometry to two equivalent Se(2) and six equivalent Se(1) atoms. There is one shorter (2.83 Å) and one longer (2.97 Å) U(1)-Se(2) bond length. There are a spread of U(1)-Se(1) bond distances ranging from 2.95-3.07 Å. Pd(1) is bonded to two equivalent Se(2) and four equivalent Se(1) atoms to form distorted corner-sharing PdSe6 octahedra. The corner-sharing octahedral tilt angles range from 43-59°. Both Pd(1)-Se(2) bond lengths are 2.50 Å. There are two shorter (2.51 Å) and two longer (3.05 Å) Pd(1)-Se(1) bond lengths. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 5-coordinate geometry to three equivalent U(1) and two equivalent Pd(1) atoms. In the second Se site, Se(2) is bonded in a see-saw-like geometry to two equivalent U(1) and two equivalent Pd(1) atoms.