Tb9(SbO)5 crystallizes in the tetragonal P4/n space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a distorted single-bond geometry to one Sb(2), four equivalent Sb(1), and one O(1) atom. In the second Tb site, Tb(2) is bonded in a distorted single-bond geometry to one Sb(2), four equivalent Sb(1), and one O(2) atom. In the third Tb site, Tb(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 Tb(2), two equivalent Tb(3), and four equivalent Tb(1) atoms. In the second Sb site, Sb(2) is bonded to one Tb(2) and four equivalent Tb(1) atoms to form SbTb5 square pyramids that share corners with four equivalent O(1)Tb4 tetrahedra and  a cornercorner with one O(2)Tb5 trigonal bipyramid. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Tb(1) and three equivalent Tb(3) atoms to form OTb4 tetrahedra that share  a cornercorner with one Sb(2)Tb5 square pyramid, corners with four equivalent O(1)Tb4 tetrahedra,  a cornercorner with one O(2)Tb5 trigonal bipyramid,  an edgeedge with one O(1)Tb4 tetrahedra, and  an edgeedge with one O(2)Tb5 trigonal bipyramid. In the second O site, O(2) is bonded to one Tb(2) and four equivalent Tb(3) atoms to form distorted OTb5 trigonal bipyramids that share  a cornercorner with one Sb(2)Tb5 square pyramid, corners with four equivalent O(1)Tb4 tetrahedra, and edges with four equivalent O(1)Tb4 tetrahedra.
Tb9(SbO)5 crystallizes in the tetragonal P4/n space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a distorted single-bond geometry to one Sb(2), four equivalent Sb(1), and one O(1) atom. The Tb(1)-Sb(2) bond length is 3.10 Å. There are a spread of Tb(1)-Sb(1) bond distances ranging from 3.13-3.18 Å. The Tb(1)-O(1) bond length is 2.27 Å. In the second Tb site, Tb(2) is bonded in a distorted single-bond geometry to one Sb(2), four equivalent Sb(1), and one O(2) atom. The Tb(2)-Sb(2) bond length is 3.15 Å. All Tb(2)-Sb(1) bond lengths are 3.16 Å. The Tb(2)-O(2) bond length is 2.34 Å. In the third Tb site, Tb(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) Tb(3)-Sb(1) bond length. The Tb(3)-O(2) bond length is 2.45 Å. There are a spread of Tb(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 Tb(2), two equivalent Tb(3), and four equivalent Tb(1) atoms. In the second Sb site, Sb(2) is bonded to one Tb(2) and four equivalent Tb(1) atoms to form SbTb5 square pyramids that share corners with four equivalent O(1)Tb4 tetrahedra and  a cornercorner with one O(2)Tb5 trigonal bipyramid. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Tb(1) and three equivalent Tb(3) atoms to form OTb4 tetrahedra that share  a cornercorner with one Sb(2)Tb5 square pyramid, corners with four equivalent O(1)Tb4 tetrahedra,  a cornercorner with one O(2)Tb5 trigonal bipyramid,  an edgeedge with one O(1)Tb4 tetrahedra, and  an edgeedge with one O(2)Tb5 trigonal bipyramid. In the second O site, O(2) is bonded to one Tb(2) and four equivalent Tb(3) atoms to form distorted OTb5 trigonal bipyramids that share  a cornercorner with one Sb(2)Tb5 square pyramid, corners with four equivalent O(1)Tb4 tetrahedra, and edges with four equivalent O(1)Tb4 tetrahedra.