Sn3Si crystallizes in the triclinic P-1 space group. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Sn(1), four equivalent Sn(2), and three equivalent Si(1) atoms. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to eight equivalent Sn(1) and two equivalent Si(1) atoms. Si(1) is bonded in a 8-coordinate geometry to two equivalent Sn(2) and six equivalent Sn(1) atoms.
Sn3Si crystallizes in the triclinic P-1 space group. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to two equivalent Sn(1), four equivalent Sn(2), and three equivalent Si(1) atoms. There is one shorter (3.15 Å) and one longer (3.42 Å) Sn(1)-Sn(1) bond length. There are a spread of Sn(1)-Sn(2) bond distances ranging from 3.15-3.36 Å. There are a spread of Sn(1)-Si(1) bond distances ranging from 3.02-3.18 Å. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to eight equivalent Sn(1) and two equivalent Si(1) atoms. Both Sn(2)-Si(1) bond lengths are 3.28 Å. Si(1) is bonded in a 8-coordinate geometry to two equivalent Sn(2) and six equivalent Sn(1) atoms.