Sn3Se is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted body-centered cubic geometry to four equivalent Sn(2) and four equivalent Se(1) atoms. In the second Sn site, Sn(2) is bonded in a body-centered cubic geometry to eight equivalent Sn(1) atoms. Se(1) is bonded in a body-centered cubic geometry to eight equivalent Sn(1) atoms.
Sn3Se is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a distorted body-centered cubic geometry to four equivalent Sn(2) and four equivalent Se(1) atoms. All Sn(1)-Sn(2) bond lengths are 3.23 Å. All Sn(1)-Se(1) bond lengths are 3.23 Å. In the second Sn site, Sn(2) is bonded in a body-centered cubic geometry to eight equivalent Sn(1) atoms. Se(1) is bonded in a body-centered cubic geometry to eight equivalent Sn(1) atoms.