BaDyTb2O6 crystallizes in the orthorhombic Cmmm space group. Ba(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(3) atoms. Dy(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. Tb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing TbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-44°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Dy(1), and two equivalent Tb(1) atoms. In the second O site, O(2) is bonded to two equivalent Dy(1) and two equivalent Tb(1) atoms to form distorted OTb2Dy2 tetrahedra that share corners with four equivalent O(3)Ba2Tb2 tetrahedra, corners with six equivalent O(2)Tb2Dy2 tetrahedra, and  an edgeedge with one O(2)Tb2Dy2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Ba(1) and two equivalent Tb(1) atoms to form distorted OBa2Tb2 tetrahedra that share corners with four equivalent O(2)Tb2Dy2 tetrahedra, corners with six equivalent O(3)Ba2Tb2 tetrahedra, and  an edgeedge with one O(3)Ba2Tb2 tetrahedra.
BaDyTb2O6 crystallizes in the orthorhombic Cmmm space group. Ba(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(3) atoms. All Ba(1)-O(1) bond lengths are 3.03 Å. All Ba(1)-O(3) bond lengths are 2.67 Å. Dy(1) is bonded in a distorted body-centered cubic geometry to four equivalent O(1) and four equivalent O(2) atoms. All Dy(1)-O(1) bond lengths are 3.03 Å. All Dy(1)-O(2) bond lengths are 2.53 Å. Tb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form corner-sharing TbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-44°. Both Tb(1)-O(1) bond lengths are 2.19 Å. Both Tb(1)-O(2) bond lengths are 2.32 Å. Both Tb(1)-O(3) bond lengths are 2.22 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Dy(1), and two equivalent Tb(1) atoms. In the second O site, O(2) is bonded to two equivalent Dy(1) and two equivalent Tb(1) atoms to form distorted OTb2Dy2 tetrahedra that share corners with four equivalent O(3)Ba2Tb2 tetrahedra, corners with six equivalent O(2)Tb2Dy2 tetrahedra, and  an edgeedge with one O(2)Tb2Dy2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Ba(1) and two equivalent Tb(1) atoms to form distorted OBa2Tb2 tetrahedra that share corners with four equivalent O(2)Tb2Dy2 tetrahedra, corners with six equivalent O(3)Ba2Tb2 tetrahedra, and  an edgeedge with one O(3)Ba2Tb2 tetrahedra.