Dy4Cu7Sn11 crystallizes in the tetragonal P4mm space group. There are four inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(4), four equivalent Sn(3), and four equivalent Sn(7) atoms. In the second Dy site, Dy(2) is bonded in a 16-coordinate geometry to four equivalent Cu(2), four equivalent Cu(3), four equivalent Cu(5), and four equivalent Sn(4) atoms. In the third Dy site, Dy(3) is bonded to four equivalent Cu(1), four equivalent Sn(2), and four equivalent Sn(5) atoms to form a mixture of distorted face and corner-sharing DyCu4Sn8 cuboctahedra. In the fourth Dy site, Dy(4) is bonded to one Cu(3), four equivalent Cu(2), four equivalent Sn(1), and four equivalent Sn(6) atoms to form a mixture of distorted face and corner-sharing DyCu5Sn8 cuboctahedra. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to two equivalent Dy(1), two equivalent Dy(3), two equivalent Sn(5), and two equivalent Sn(7) atoms. In the second Cu site, Cu(2) is bonded in a 8-coordinate geometry to two equivalent Dy(2), two equivalent Dy(4), two equivalent Cu(3), and two equivalent Sn(6) atoms. In the third Cu site, Cu(3) is bonded in a 10-coordinate geometry to one Dy(4), four equivalent Dy(2), one Cu(5), and four equivalent Cu(2) atoms. In the fourth Cu site, Cu(4) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Sn(7), and four equivalent Sn(3) atoms. In the fifth Cu site, Cu(5) is bonded in a 9-coordinate geometry to four equivalent Dy(2), one Cu(3), and four equivalent Sn(4) atoms. There are seven inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 7-coordinate geometry to two equivalent Dy(4), one Sn(3), and four equivalent Sn(1) atoms. In the second Sn site, Sn(2) is bonded in a 7-coordinate geometry to two equivalent Dy(3), one Sn(4), and four equivalent Sn(2) atoms. In the third Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent Dy(1), two equivalent Cu(4), one Sn(1), and four equivalent Sn(3) atoms. In the fourth Sn site, Sn(4) is bonded in a 9-coordinate geometry to two equivalent Dy(2), two equivalent Cu(5), one Sn(2), and four equivalent Sn(4) atoms. In the fifth Sn site, Sn(5) is bonded in a 8-coordinate geometry to four equivalent Dy(3) and four equivalent Cu(1) atoms. In the sixth Sn site, Sn(6) is bonded in a 8-coordinate geometry to four equivalent Dy(4) and four equivalent Cu(2) atoms. In the seventh Sn site, Sn(7) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Cu(4), and four equivalent Cu(1) atoms.
Dy4Cu7Sn11 crystallizes in the tetragonal P4mm space group. There are four inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 16-coordinate geometry to four equivalent Cu(1), four equivalent Cu(4), four equivalent Sn(3), and four equivalent Sn(7) atoms. All Dy(1)-Cu(1) bond lengths are 3.30 Å. All Dy(1)-Cu(4) bond lengths are 3.39 Å. All Dy(1)-Sn(3) bond lengths are 3.49 Å. All Dy(1)-Sn(7) bond lengths are 3.31 Å. In the second Dy site, Dy(2) is bonded in a 16-coordinate geometry to four equivalent Cu(2), four equivalent Cu(3), four equivalent Cu(5), and four equivalent Sn(4) atoms. All Dy(2)-Cu(2) bond lengths are 3.10 Å. All Dy(2)-Cu(3) bond lengths are 3.31 Å. All Dy(2)-Cu(5) bond lengths are 3.36 Å. All Dy(2)-Sn(4) bond lengths are 3.52 Å. In the third Dy site, Dy(3) is bonded to four equivalent Cu(1), four equivalent Sn(2), and four equivalent Sn(5) atoms to form a mixture of distorted face and corner-sharing DyCu4Sn8 cuboctahedra. All Dy(3)-Cu(1) bond lengths are 3.09 Å. All Dy(3)-Sn(2) bond lengths are 3.27 Å. All Dy(3)-Sn(5) bond lengths are 3.19 Å. In the fourth Dy site, Dy(4) is bonded to one Cu(3), four equivalent Cu(2), four equivalent Sn(1), and four equivalent Sn(6) atoms to form a mixture of distorted face and corner-sharing DyCu5Sn8 cuboctahedra. The Dy(4)-Cu(3) bond length is 3.37 Å. All Dy(4)-Cu(2) bond lengths are 3.18 Å. All Dy(4)-Sn(1) bond lengths are 3.27 Å. All Dy(4)-Sn(6) bond lengths are 3.22 Å. There are five inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to two equivalent Dy(1), two equivalent Dy(3), two equivalent Sn(5), and two equivalent Sn(7) atoms. Both Cu(1)-Sn(5) bond lengths are 2.68 Å. Both Cu(1)-Sn(7) bond lengths are 2.57 Å. In the second Cu site, Cu(2) is bonded in a 8-coordinate geometry to two equivalent Dy(2), two equivalent Dy(4), two equivalent Cu(3), and two equivalent Sn(6) atoms. Both Cu(2)-Cu(3) bond lengths are 2.46 Å. Both Cu(2)-Sn(6) bond lengths are 2.65 Å. In the third Cu site, Cu(3) is bonded in a 10-coordinate geometry to one Dy(4), four equivalent Dy(2), one Cu(5), and four equivalent Cu(2) atoms. The Cu(3)-Cu(5) bond length is 2.35 Å. In the fourth Cu site, Cu(4) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Sn(7), and four equivalent Sn(3) atoms. The Cu(4)-Sn(7) bond length is 2.46 Å. All Cu(4)-Sn(3) bond lengths are 2.60 Å. In the fifth Cu site, Cu(5) is bonded in a 9-coordinate geometry to four equivalent Dy(2), one Cu(3), and four equivalent Sn(4) atoms. All Cu(5)-Sn(4) bond lengths are 2.66 Å. There are seven inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 7-coordinate geometry to two equivalent Dy(4), one Sn(3), and four equivalent Sn(1) atoms. The Sn(1)-Sn(3) bond length is 2.92 Å. All Sn(1)-Sn(1) bond lengths are 3.12 Å. In the second Sn site, Sn(2) is bonded in a 7-coordinate geometry to two equivalent Dy(3), one Sn(4), and four equivalent Sn(2) atoms. The Sn(2)-Sn(4) bond length is 2.97 Å. All Sn(2)-Sn(2) bond lengths are 3.12 Å. In the third Sn site, Sn(3) is bonded in a 9-coordinate geometry to two equivalent Dy(1), two equivalent Cu(4), one Sn(1), and four equivalent Sn(3) atoms. All Sn(3)-Sn(3) bond lengths are 3.12 Å. In the fourth Sn site, Sn(4) is bonded in a 9-coordinate geometry to two equivalent Dy(2), two equivalent Cu(5), one Sn(2), and four equivalent Sn(4) atoms. All Sn(4)-Sn(4) bond lengths are 3.12 Å. In the fifth Sn site, Sn(5) is bonded in a 8-coordinate geometry to four equivalent Dy(3) and four equivalent Cu(1) atoms. In the sixth Sn site, Sn(6) is bonded in a 8-coordinate geometry to four equivalent Dy(4) and four equivalent Cu(2) atoms. In the seventh Sn site, Sn(7) is bonded in a 9-coordinate geometry to four equivalent Dy(1), one Cu(4), and four equivalent Cu(1) atoms.