FeSn crystallizes in the hexagonal P6/mmm space group. Fe(1) is bonded in a 10-coordinate geometry to four equivalent Fe(1), two 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 hexagonal planar geometry to six equivalent Fe(1) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to six equivalent Fe(1) and three equivalent Sn(2) atoms.
FeSn crystallizes in the hexagonal P6/mmm space group. Fe(1) is bonded in a 10-coordinate geometry to four equivalent Fe(1), two equivalent Sn(1), and four equivalent Sn(2) atoms. All Fe(1)-Fe(1) bond lengths are 2.65 Å. Both Fe(1)-Sn(1) bond lengths are 2.65 Å. All Fe(1)-Sn(2) bond lengths are 2.73 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a hexagonal planar geometry to six equivalent Fe(1) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to six equivalent Fe(1) and three equivalent Sn(2) atoms. All Sn(2)-Sn(2) bond lengths are 3.06 Å.