Dy4Te7 crystallizes in the tetragonal P-4m2 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 9-coordinate geometry to one Te(1); four equivalent Te(2); and four equivalent Te(3,5) atoms. In the second Dy site, Dy(2) is bonded to one Te(2), two equivalent Te(4), and four equivalent Te(1) atoms to form a mixture of distorted face, corner, and edge-sharing DyTe7 pentagonal bipyramids. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded to one Dy(1) and four equivalent Dy(2) atoms to form a mixture of distorted corner and edge-sharing TeDy5 trigonal bipyramids. In the second Te site, Te(2) is bonded to one Dy(2) and four equivalent Dy(1) atoms to form a mixture of distorted corner and edge-sharing TeDy5 trigonal bipyramids. In the third Te site, Te(3,5) is bonded in a 8-coordinate geometry to four equivalent Dy(1) and four equivalent Te(3,5) atoms. In the fourth Te site, Te(4) is bonded in a 4-coordinate geometry to four equivalent Dy(2) atoms.
Dy4Te7 crystallizes in the tetragonal P-4m2 space group. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 9-coordinate geometry to one Te(1); four equivalent Te(2); and four equivalent Te(3,5) atoms. The Dy(1)-Te(1) bond length is 3.20 Å. All Dy(1)-Te(2) bond lengths are 3.21 Å. All Dy(1)-Te(3,5) bond lengths are 3.27 Å. In the second Dy site, Dy(2) is bonded to one Te(2), two equivalent Te(4), and four equivalent Te(1) atoms to form a mixture of distorted face, corner, and edge-sharing DyTe7 pentagonal bipyramids. The Dy(2)-Te(2) bond length is 3.19 Å. Both Dy(2)-Te(4) bond lengths are 3.14 Å. All Dy(2)-Te(1) bond lengths are 3.21 Å. There are four inequivalent Te sites. In the first Te site, Te(1) is bonded to one Dy(1) and four equivalent Dy(2) atoms to form a mixture of distorted corner and edge-sharing TeDy5 trigonal bipyramids. In the second Te site, Te(2) is bonded to one Dy(2) and four equivalent Dy(1) atoms to form a mixture of distorted corner and edge-sharing TeDy5 trigonal bipyramids. In the third Te site, Te(3,5) is bonded in a 8-coordinate geometry to four equivalent Dy(1) and four equivalent Te(3,5) atoms. All Te(3,5)-Te(3,5) bond lengths are 3.08 Å. In the fourth Te site, Te(4) is bonded in a 4-coordinate geometry to four equivalent Dy(2) atoms.