Dy3Tl5 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 9-coordinate geometry to one Tl(1), four equivalent Tl(2), and four equivalent Tl(3) atoms. In the second Dy site, Dy(2) is bonded in a 10-coordinate geometry to two equivalent Tl(1), four equivalent Tl(2), and four equivalent Tl(3) atoms. There are three inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 11-coordinate geometry to one Dy(1), four equivalent Dy(2), two equivalent Tl(2), and four equivalent Tl(3) atoms. In the second Tl site, Tl(2) is bonded in a 10-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Tl(1), one Tl(2), and two equivalent Tl(3) atoms. In the third Tl site, Tl(3) is bonded in a 10-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), two equivalent Tl(1), and two equivalent Tl(2) atoms.
Dy3Tl5 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 9-coordinate geometry to one Tl(1), four equivalent Tl(2), and four equivalent Tl(3) atoms. The Dy(1)-Tl(1) bond length is 3.06 Å. There are two shorter (3.18 Å) and two longer (3.33 Å) Dy(1)-Tl(2) bond lengths. There are two shorter (3.12 Å) and two longer (3.53 Å) Dy(1)-Tl(3) bond lengths. In the second Dy site, Dy(2) is bonded in a 10-coordinate geometry to two equivalent Tl(1), four equivalent Tl(2), and four equivalent Tl(3) atoms. Both Dy(2)-Tl(1) bond lengths are 3.39 Å. There are two shorter (3.24 Å) and two longer (3.46 Å) Dy(2)-Tl(2) bond lengths. There are two shorter (3.22 Å) and two longer (3.50 Å) Dy(2)-Tl(3) bond lengths. There are three inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 11-coordinate geometry to one Dy(1), four equivalent Dy(2), two equivalent Tl(2), and four equivalent Tl(3) atoms. Both Tl(1)-Tl(2) bond lengths are 3.25 Å. There are two shorter (3.28 Å) and two longer (3.29 Å) Tl(1)-Tl(3) bond lengths. In the second Tl site, Tl(2) is bonded in a 10-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), one Tl(1), one Tl(2), and two equivalent Tl(3) atoms. The Tl(2)-Tl(2) bond length is 3.31 Å. Both Tl(2)-Tl(3) bond lengths are 3.20 Å. In the third Tl site, Tl(3) is bonded in a 10-coordinate geometry to two equivalent Dy(1), four equivalent Dy(2), two equivalent Tl(1), and two equivalent Tl(2) atoms.