Sm3Ru4Sn13 crystallizes in the cubic Pm-3n space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Ru(1) and twelve equivalent Sn(2) atoms. Ru(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(2) is bonded in a 2-coordinate geometry to three equivalent Sm(1), two equivalent Ru(1), and one Sn(1) atom. In the second Sn site, Sn(1) is bonded in a cuboctahedral geometry to twelve equivalent Sn(2) atoms.
Sm3Ru4Sn13 crystallizes in the cubic Pm-3n space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Ru(1) and twelve equivalent Sn(2) atoms. All Sm(1)-Ru(1) bond lengths are 3.45 Å. There are four shorter (3.41 Å) and eight longer (3.45 Å) Sm(1)-Sn(2) bond lengths. Ru(1) is bonded in a 9-coordinate geometry to three equivalent Sm(1) and six equivalent Sn(2) atoms. All Ru(1)-Sn(2) bond lengths are 2.66 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(2) is bonded in a 2-coordinate geometry to three equivalent Sm(1), two equivalent Ru(1), and one Sn(1) atom. The Sn(2)-Sn(1) bond length is 3.30 Å. In the second Sn site, Sn(1) is bonded in a cuboctahedral geometry to twelve equivalent Sn(2) atoms.