U3Rh4Sn13 crystallizes in the cubic Pm-3n space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Rh(1) and twelve equivalent Sn(1) atoms. Rh(1) is bonded in a 6-coordinate geometry to three equivalent U(1) and six equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(2) is bonded in a cuboctahedral geometry to twelve equivalent Sn(1) atoms. In the second Sn site, Sn(1) is bonded in a 2-coordinate geometry to three equivalent U(1), two equivalent Rh(1), and one Sn(2) atom.
U3Rh4Sn13 crystallizes in the cubic Pm-3n space group. U(1) is bonded in a 16-coordinate geometry to four equivalent Rh(1) and twelve equivalent Sn(1) atoms. All U(1)-Rh(1) bond lengths are 3.44 Å. There are eight shorter (3.39 Å) and four longer (3.44 Å) U(1)-Sn(1) bond lengths. Rh(1) is bonded in a 6-coordinate geometry to three equivalent U(1) and six equivalent Sn(1) atoms. All Rh(1)-Sn(1) bond lengths are 2.68 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(2) is bonded in a cuboctahedral geometry to twelve equivalent Sn(1) atoms. All Sn(2)-Sn(1) bond lengths are 3.37 Å. In the second Sn site, Sn(1) is bonded in a 2-coordinate geometry to three equivalent U(1), two equivalent Rh(1), and one Sn(2) atom.