Dy5Tl3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Tl(1) and four equivalent Tl(2) atoms to form distorted corner-sharing DyTl6 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. In the second Dy site, Dy(2) is bonded in a 5-coordinate geometry to two equivalent Tl(1) and three equivalent Tl(2) atoms. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 10-coordinate geometry to two equivalent Dy(1) and eight equivalent Dy(2) atoms. In the second Tl site, Tl(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), six equivalent Dy(2), and one Tl(2) atom.
Dy5Tl3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded to two equivalent Tl(1) and four equivalent Tl(2) atoms to form distorted corner-sharing DyTl6 octahedra. The corner-sharing octahedral tilt angles range from 0-50°. Both Dy(1)-Tl(1) bond lengths are 3.61 Å. All Dy(1)-Tl(2) bond lengths are 3.14 Å. In the second Dy site, Dy(2) is bonded in a 5-coordinate geometry to two equivalent Tl(1) and three equivalent Tl(2) atoms. Both Dy(2)-Tl(1) bond lengths are 3.34 Å. There is one shorter (3.19 Å) and two longer (3.24 Å) Dy(2)-Tl(2) bond lengths. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 10-coordinate geometry to two equivalent Dy(1) and eight equivalent Dy(2) atoms. In the second Tl site, Tl(2) is bonded in a 9-coordinate geometry to two equivalent Dy(1), six equivalent Dy(2), and one Tl(2) atom. The Tl(2)-Tl(2) bond length is 3.06 Å.