Ir5Sn7 crystallizes in the tetragonal I4mm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 7-coordinate geometry to one Sn(3), two equivalent Sn(2), and four equivalent Sn(1) atoms. In the second Ir site, Ir(2) is bonded in a square pyramidal geometry to one Sn(3) and four equivalent Sn(1) atoms. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Ir(1) atoms to form edge-sharing SnIr4 tetrahedra. In the third Sn site, Sn(3) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms.
Ir5Sn7 crystallizes in the tetragonal I4mm space group. There are two inequivalent Ir sites. In the first Ir site, Ir(1) is bonded in a 7-coordinate geometry to one Sn(3), two equivalent Sn(2), and four equivalent Sn(1) atoms. The Ir(1)-Sn(3) bond length is 2.76 Å. There is one shorter (2.69 Å) and one longer (2.77 Å) Ir(1)-Sn(2) bond length. There are two shorter (2.71 Å) and two longer (2.85 Å) Ir(1)-Sn(1) bond lengths. In the second Ir site, Ir(2) is bonded in a square pyramidal geometry to one Sn(3) and four equivalent Sn(1) atoms. The Ir(2)-Sn(3) bond length is 2.60 Å. All Ir(2)-Sn(1) bond lengths are 2.61 Å. There are three inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms. In the second Sn site, Sn(2) is bonded to four equivalent Ir(1) atoms to form edge-sharing SnIr4 tetrahedra. In the third Sn site, Sn(3) is bonded in a 5-coordinate geometry to one Ir(2) and four equivalent Ir(1) atoms.