Lu(CuSn)2 crystallizes in the tetragonal P4/nmm space group. Lu(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 12-coordinate geometry to four equivalent Lu(1), four equivalent Cu(1), and four equivalent Sn(2) atoms. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to four equivalent Lu(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 to four equivalent Lu(1) and four equivalent Cu(2) atoms to form a mixture of distorted face and edge-sharing SnLu4Cu4 tetrahedra. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent Lu(1), one Cu(2), and four equivalent Cu(1) atoms.
Lu(CuSn)2 crystallizes in the tetragonal P4/nmm space group. Lu(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 Lu(1)-Cu(1) bond lengths are 3.34 Å. All Lu(1)-Cu(2) bond lengths are 3.34 Å. All Lu(1)-Sn(1) bond lengths are 3.64 Å. All Lu(1)-Sn(2) bond lengths are 3.24 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 12-coordinate geometry to four equivalent Lu(1), four equivalent Cu(1), and four equivalent Sn(2) atoms. All Cu(1)-Cu(1) bond lengths are 3.04 Å. All Cu(1)-Sn(2) bond lengths are 2.60 Å. In the second Cu site, Cu(2) is bonded in a 9-coordinate geometry to four equivalent Lu(1), one Sn(2), and four equivalent Sn(1) atoms. The Cu(2)-Sn(2) bond length is 2.47 Å. All Cu(2)-Sn(1) bond lengths are 2.66 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded to four equivalent Lu(1) and four equivalent Cu(2) atoms to form a mixture of distorted face and edge-sharing SnLu4Cu4 tetrahedra. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to four equivalent Lu(1), one Cu(2), and four equivalent Cu(1) atoms.