Dy3Cu4Sn4 crystallizes in the triclinic P-1 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Sn(1) and four equivalent Sn(2) atoms to form distorted edge-sharing DySn6 octahedra. In the second Dy site, Dy(2) is bonded in a 12-coordinate geometry to three equivalent Cu(1), three equivalent Cu(2), two 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 three equivalent Dy(2), one Cu(2), one Sn(2), and three equivalent Sn(1) atoms. In the second Cu site, Cu(2) is bonded in a 8-coordinate geometry to three equivalent Dy(2), one Cu(1), one Sn(2), and three equivalent Sn(1) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to one Dy(1), two equivalent Dy(2), three equivalent Cu(1), and three equivalent Cu(2) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Cu(1), one Cu(2), and one Sn(2) atom.
Dy3Cu4Sn4 crystallizes in the triclinic P-1 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Sn(1) and four equivalent Sn(2) atoms to form distorted edge-sharing DySn6 octahedra. Both Dy(1)-Sn(1) bond lengths are 3.17 Å. There are two shorter (3.02 Å) and two longer (3.03 Å) Dy(1)-Sn(2) bond lengths. In the second Dy site, Dy(2) is bonded in a 12-coordinate geometry to three equivalent Cu(1), three equivalent Cu(2), two equivalent Sn(1), and four equivalent Sn(2) atoms. There is one shorter (3.14 Å) and two longer (3.16 Å) Dy(2)-Cu(1) bond lengths. There are two shorter (3.14 Å) and one longer (3.19 Å) Dy(2)-Cu(2) bond length. There is one shorter (3.14 Å) and one longer (3.15 Å) Dy(2)-Sn(1) bond length. There are two shorter (3.25 Å) and two longer (3.26 Å) Dy(2)-Sn(2) bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 8-coordinate geometry to three equivalent Dy(2), one Cu(2), one Sn(2), and three equivalent Sn(1) atoms. The Cu(1)-Cu(2) bond length is 2.59 Å. The Cu(1)-Sn(2) bond length is 2.61 Å. There are a spread of Cu(1)-Sn(1) bond distances ranging from 2.65-2.72 Å. In the second Cu site, Cu(2) is bonded in a 8-coordinate geometry to three equivalent Dy(2), one Cu(1), one Sn(2), and three equivalent Sn(1) atoms. The Cu(2)-Sn(2) bond length is 2.61 Å. There are two shorter (2.66 Å) and one longer (2.72 Å) Cu(2)-Sn(1) bond length. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 9-coordinate geometry to one Dy(1), two equivalent Dy(2), three equivalent Cu(1), and three equivalent Cu(2) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Cu(1), one Cu(2), and one Sn(2) atom. The Sn(2)-Sn(2) bond length is 2.80 Å.