Sm(CuSn)2 crystallizes in the tetragonal P4/nmm space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), four equivalent Sn(1), and four equivalent Sn(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Sn(2) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Sn(2), and four equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and four equivalent Cu(2) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Cu(2), and four equivalent Cu(1) atoms.
Sm(CuSn)2 crystallizes in the tetragonal P4/nmm space group. Sm(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(2), four equivalent Sn(1), and four equivalent Sn(2) atoms. All Sm(1)-Cu(1) bond lengths are 3.36 Å. All Sm(1)-Cu(2) bond lengths are 3.38 Å. All Sm(1)-Sn(1) bond lengths are 3.55 Å. All Sm(1)-Sn(2) bond lengths are 3.32 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to four equivalent Sm(1) and four equivalent Sn(2) atoms. All Cu(1)-Sn(2) bond lengths are 2.59 Å. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Sn(2), and four equivalent Sn(1) atoms. The Cu(2)-Sn(2) bond length is 2.51 Å. All Cu(2)-Sn(1) bond lengths are 2.64 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 4-coordinate geometry to four equivalent Sm(1) and four equivalent Cu(2) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent Sm(1), one Cu(2), and four equivalent Cu(1) atoms.