Dy9(SbO)5 crystallizes in the tetragonal P4/n space group. There are three inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a distorted single-bond geometry to one Sb(2), four equivalent Sb(1), and one O(2) atom. In the second Dy site, Dy(2) is bonded in a distorted single-bond geometry to one Sb(2), four equivalent Sb(1), and one O(1) atom. In the third Dy site, Dy(3) is bonded in a 4-coordinate geometry to two equivalent Sb(1), one O(2), and three equivalent O(1) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 7-coordinate geometry to one Dy(1), two equivalent Dy(3), and four equivalent Dy(2) atoms. In the second Sb site, Sb(2) is bonded to one Dy(1) and four equivalent Dy(2) atoms to form SbDy5 square pyramids that share corners with four equivalent O(1)Dy4 tetrahedra and  a cornercorner with one O(2)Dy5 trigonal bipyramid. There are two inequivalent O sites. In the first O site, O(2) is bonded to one Dy(1) and four equivalent Dy(3) atoms to form distorted ODy5 trigonal bipyramids that share  a cornercorner with one Sb(2)Dy5 square pyramid, corners with four equivalent O(1)Dy4 tetrahedra, and edges with four equivalent O(1)Dy4 tetrahedra. In the second O site, O(1) is bonded to one Dy(2) and three equivalent Dy(3) atoms to form ODy4 tetrahedra that share  a cornercorner with one Sb(2)Dy5 square pyramid, corners with four equivalent O(1)Dy4 tetrahedra,  a cornercorner with one O(2)Dy5 trigonal bipyramid,  an edgeedge with one O(1)Dy4 tetrahedra, and  an edgeedge with one O(2)Dy5 trigonal bipyramid.
Dy9(SbO)5 crystallizes in the tetragonal P4/n space group. There are three inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a distorted single-bond geometry to one Sb(2), four equivalent Sb(1), and one O(2) atom. The Dy(1)-Sb(2) bond length is 3.14 Å. All Dy(1)-Sb(1) bond lengths are 3.16 Å. The Dy(1)-O(2) bond length is 2.34 Å. In the second Dy site, Dy(2) is bonded in a distorted single-bond geometry to one Sb(2), four equivalent Sb(1), and one O(1) atom. The Dy(2)-Sb(2) bond length is 3.09 Å. There are a spread of Dy(2)-Sb(1) bond distances ranging from 3.12-3.18 Å. The Dy(2)-O(1) bond length is 2.28 Å. In the third Dy site, Dy(3) is bonded in a 4-coordinate geometry to two equivalent Sb(1), one O(2), and three equivalent O(1) atoms. There is one shorter (3.31 Å) and one longer (3.38 Å) Dy(3)-Sb(1) bond length. The Dy(3)-O(2) bond length is 2.45 Å. There are a spread of Dy(3)-O(1) bond distances ranging from 2.19-2.30 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 7-coordinate geometry to one Dy(1), two equivalent Dy(3), and four equivalent Dy(2) atoms. In the second Sb site, Sb(2) is bonded to one Dy(1) and four equivalent Dy(2) atoms to form SbDy5 square pyramids that share corners with four equivalent O(1)Dy4 tetrahedra and  a cornercorner with one O(2)Dy5 trigonal bipyramid. There are two inequivalent O sites. In the first O site, O(2) is bonded to one Dy(1) and four equivalent Dy(3) atoms to form distorted ODy5 trigonal bipyramids that share  a cornercorner with one Sb(2)Dy5 square pyramid, corners with four equivalent O(1)Dy4 tetrahedra, and edges with four equivalent O(1)Dy4 tetrahedra. In the second O site, O(1) is bonded to one Dy(2) and three equivalent Dy(3) atoms to form ODy4 tetrahedra that share  a cornercorner with one Sb(2)Dy5 square pyramid, corners with four equivalent O(1)Dy4 tetrahedra,  a cornercorner with one O(2)Dy5 trigonal bipyramid,  an edgeedge with one O(1)Dy4 tetrahedra, and  an edgeedge with one O(2)Dy5 trigonal bipyramid.