MgDy6(Sb5O12)2 crystallizes in the cubic I-43m space group. Mg(1) is bonded in an octahedral geometry to six equivalent Sb(2) atoms. Dy(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. In the second Sb site, Sb(2) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent O(1), and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Dy(1), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Dy(1) and one Sb(2) atom.
MgDy6(Sb5O12)2 crystallizes in the cubic I-43m space group. Mg(1) is bonded in an octahedral geometry to six equivalent Sb(2) atoms. All Mg(1)-Sb(2) bond lengths are 3.19 Å. Dy(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. All Dy(1)-O(1) bond lengths are 2.63 Å. All Dy(1)-O(2) bond lengths are 2.26 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. All Sb(1)-O(1) bond lengths are 2.04 Å. In the second Sb site, Sb(2) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent O(1), and two equivalent O(2) atoms. Both Sb(2)-O(1) bond lengths are 2.22 Å. Both Sb(2)-O(2) bond lengths are 2.00 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Dy(1), one Sb(1), and one Sb(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent Dy(1) and one Sb(2) atom.