Os3Sn7 crystallizes in the cubic Im-3m space group. Os(1) is bonded in a 8-coordinate geometry to four equivalent Sn(1) and four equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to four equivalent Os(1) atoms. In the second Sn site, Sn(2) is bonded in a 7-coordinate geometry to three equivalent Os(1) and four equivalent Sn(2) atoms.
Os3Sn7 crystallizes in the cubic Im-3m space group. Os(1) is bonded in a 8-coordinate geometry to four equivalent Sn(1) and four equivalent Sn(2) atoms. All Os(1)-Sn(1) bond lengths are 2.78 Å. All Os(1)-Sn(2) bond lengths are 2.75 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to four equivalent Os(1) atoms. In the second Sn site, Sn(2) is bonded in a 7-coordinate geometry to three equivalent Os(1) and four equivalent Sn(2) atoms. There is one shorter (2.93 Å) and three longer (3.03 Å) Sn(2)-Sn(2) bond lengths.