CoSn3 crystallizes in the tetragonal I4_1/acd space group. Co(1) is bonded in a 9-coordinate geometry to one Co(1), 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 5-coordinate geometry to four equivalent Co(1), one Sn(1), and two equivalent Sn(2) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent Co(1), one Sn(1), and six equivalent Sn(2) atoms.
CoSn3 crystallizes in the tetragonal I4_1/acd space group. Co(1) is bonded in a 9-coordinate geometry to one Co(1), four equivalent Sn(1), and four equivalent Sn(2) atoms. The Co(1)-Co(1) bond length is 2.72 Å. All Co(1)-Sn(1) bond lengths are 2.72 Å. There are two shorter (2.73 Å) and two longer (2.74 Å) Co(1)-Sn(2) bond lengths. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to four equivalent Co(1), one Sn(1), and two equivalent Sn(2) atoms. The Sn(1)-Sn(1) bond length is 2.93 Å. Both Sn(1)-Sn(2) bond lengths are 3.14 Å. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent Co(1), one Sn(1), and six equivalent Sn(2) atoms. There are a spread of Sn(2)-Sn(2) bond distances ranging from 3.02-3.27 Å.