GdSn3 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 9-coordinate geometry to one Sn(6), two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(1) atoms. In the second Gd site, Gd(2) is bonded in a 10-coordinate geometry to two equivalent Sn(2), two equivalent Sn(5), two equivalent Sn(6), and four equivalent Sn(4) atoms. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to four equivalent Gd(1) and one Sn(5) atom. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Sn(4), and four equivalent Sn(3) atoms. In the third Sn site, Sn(3) is bonded in a 6-coordinate geometry to two equivalent Gd(1) and four equivalent Sn(2) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Gd(2) and two equivalent Sn(2) atoms. In the fifth Sn site, Sn(5) is bonded in a 7-coordinate geometry to two equivalent Gd(2), one Sn(1), and four equivalent Sn(6) atoms. In the sixth Sn site, Sn(6) is bonded in a 7-coordinate geometry to one Gd(1), two equivalent Gd(2), and four equivalent Sn(5) atoms.
GdSn3 crystallizes in the orthorhombic Amm2 space group. There are two inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 9-coordinate geometry to one Sn(6), two equivalent Sn(2), two equivalent Sn(3), and four equivalent Sn(1) atoms. The Gd(1)-Sn(6) bond length is 3.19 Å. Both Gd(1)-Sn(2) bond lengths are 3.85 Å. Both Gd(1)-Sn(3) bond lengths are 3.47 Å. All Gd(1)-Sn(1) bond lengths are 3.23 Å. In the second Gd site, Gd(2) is bonded in a 10-coordinate geometry to two equivalent Sn(2), two equivalent Sn(5), two equivalent Sn(6), and four equivalent Sn(4) atoms. Both Gd(2)-Sn(2) bond lengths are 3.64 Å. Both Gd(2)-Sn(5) bond lengths are 3.47 Å. Both Gd(2)-Sn(6) bond lengths are 3.31 Å. All Gd(2)-Sn(4) bond lengths are 3.27 Å. There are six inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 5-coordinate geometry to four equivalent Gd(1) and one Sn(5) atom. The Sn(1)-Sn(5) bond length is 2.99 Å. In the second Sn site, Sn(2) is bonded in a 10-coordinate geometry to two equivalent Gd(1), two equivalent Gd(2), two equivalent Sn(4), and four equivalent Sn(3) atoms. Both Sn(2)-Sn(4) bond lengths are 3.31 Å. All Sn(2)-Sn(3) bond lengths are 3.25 Å. In the third Sn site, Sn(3) is bonded in a 6-coordinate geometry to two equivalent Gd(1) and four equivalent Sn(2) atoms. In the fourth Sn site, Sn(4) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Gd(2) and two equivalent Sn(2) atoms. In the fifth Sn site, Sn(5) is bonded in a 7-coordinate geometry to two equivalent Gd(2), one Sn(1), and four equivalent Sn(6) atoms. All Sn(5)-Sn(6) bond lengths are 3.24 Å. In the sixth Sn site, Sn(6) is bonded in a 7-coordinate geometry to one Gd(1), two equivalent Gd(2), and four equivalent Sn(5) atoms.