SrDy2Fe2O7 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(4) atoms. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(1), and four equivalent O(3) atoms. In the second Dy site, Dy(2) is bonded to four equivalent O(3), four equivalent O(4), and four equivalent O(5) atoms to form distorted DyO12 cuboctahedra that share corners with four equivalent Dy(2)O12 cuboctahedra, faces with four equivalent Dy(2)O12 cuboctahedra, faces with four equivalent Fe(1)O6 octahedra, and faces with four equivalent Fe(2)O6 octahedra. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(5), and four equivalent O(3) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and faces with four equivalent Dy(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the second Fe site, Fe(2) is bonded to one O(2), one O(5), and four equivalent O(4) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, and faces with four equivalent Dy(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-15°. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), four equivalent Dy(1), and one Fe(1) atom to form distorted OSrDy4Fe octahedra that share  a cornercorner with one O(5)Dy4Fe2 octahedra, corners with four equivalent O(4)Sr2Dy2Fe2 octahedra, corners with four equivalent O(1)SrDy4Fe octahedra, edges with four equivalent O(2)Sr4DyFe octahedra, and edges with four equivalent O(1)SrDy4Fe octahedra. The corner-sharing octahedral tilt angles range from 0-43°. In the second O site, O(2) is bonded to four equivalent Sr(1), one Dy(1), and one Fe(2) atom to form distorted OSr4DyFe octahedra that share  a cornercorner with one O(5)Dy4Fe2 octahedra, corners with four equivalent O(2)Sr4DyFe octahedra, corners with eight equivalent O(4)Sr2Dy2Fe2 octahedra, edges with four equivalent O(2)Sr4DyFe octahedra, edges with four equivalent O(1)SrDy4Fe octahedra, and faces with four equivalent O(4)Sr2Dy2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Dy(1), two equivalent Dy(2), and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Sr(1), two equivalent Dy(2), and two equivalent Fe(2) atoms to form distorted OSr2Dy2Fe2 octahedra that share corners with two equivalent O(4)Sr2Dy2Fe2 octahedra, corners with two equivalent O(1)SrDy4Fe octahedra, corners with four equivalent O(5)Dy4Fe2 octahedra, corners with four equivalent O(2)Sr4DyFe octahedra, edges with two equivalent O(4)Sr2Dy2Fe2 octahedra, faces with two equivalent O(5)Dy4Fe2 octahedra, faces with two equivalent O(2)Sr4DyFe octahedra, and faces with four equivalent O(4)Sr2Dy2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 15-54°. In the fifth O site, O(5) is bonded to four equivalent Dy(2), one Fe(1), and one Fe(2) atom to form distorted ODy4Fe2 octahedra that share  a cornercorner with one O(2)Sr4DyFe octahedra,  a cornercorner with one O(1)SrDy4Fe octahedra, corners with four equivalent O(5)Dy4Fe2 octahedra, corners with eight equivalent O(4)Sr2Dy2Fe2 octahedra, edges with four equivalent O(5)Dy4Fe2 octahedra, and faces with four equivalent O(4)Sr2Dy2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-53°.
SrDy2Fe2O7 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(4) atoms. The Sr(1)-O(1) bond length is 2.32 Å. All Sr(1)-O(2) bond lengths are 2.71 Å. All Sr(1)-O(4) bond lengths are 2.76 Å. There are two inequivalent Dy sites. In the first Dy site, Dy(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(1), and four equivalent O(3) atoms. The Dy(1)-O(2) bond length is 2.31 Å. All Dy(1)-O(1) bond lengths are 2.71 Å. All Dy(1)-O(3) bond lengths are 2.43 Å. In the second Dy site, Dy(2) is bonded to four equivalent O(3), four equivalent O(4), and four equivalent O(5) atoms to form distorted DyO12 cuboctahedra that share corners with four equivalent Dy(2)O12 cuboctahedra, faces with four equivalent Dy(2)O12 cuboctahedra, faces with four equivalent Fe(1)O6 octahedra, and faces with four equivalent Fe(2)O6 octahedra. All Dy(2)-O(3) bond lengths are 2.96 Å. All Dy(2)-O(4) bond lengths are 2.48 Å. All Dy(2)-O(5) bond lengths are 2.70 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(5), and four equivalent O(3) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and faces with four equivalent Dy(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-5°. The Fe(1)-O(1) bond length is 1.97 Å. The Fe(1)-O(5) bond length is 1.93 Å. All Fe(1)-O(3) bond lengths are 1.90 Å. In the second Fe site, Fe(2) is bonded to one O(2), one O(5), and four equivalent O(4) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, and faces with four equivalent Dy(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-15°. The Fe(2)-O(2) bond length is 2.14 Å. The Fe(2)-O(5) bond length is 2.09 Å. All Fe(2)-O(4) bond lengths are 1.91 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), four equivalent Dy(1), and one Fe(1) atom to form distorted OSrDy4Fe octahedra that share  a cornercorner with one O(5)Dy4Fe2 octahedra, corners with four equivalent O(4)Sr2Dy2Fe2 octahedra, corners with four equivalent O(1)SrDy4Fe octahedra, edges with four equivalent O(2)Sr4DyFe octahedra, and edges with four equivalent O(1)SrDy4Fe octahedra. The corner-sharing octahedral tilt angles range from 0-43°. In the second O site, O(2) is bonded to four equivalent Sr(1), one Dy(1), and one Fe(2) atom to form distorted OSr4DyFe octahedra that share  a cornercorner with one O(5)Dy4Fe2 octahedra, corners with four equivalent O(2)Sr4DyFe octahedra, corners with eight equivalent O(4)Sr2Dy2Fe2 octahedra, edges with four equivalent O(2)Sr4DyFe octahedra, edges with four equivalent O(1)SrDy4Fe octahedra, and faces with four equivalent O(4)Sr2Dy2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Dy(1), two equivalent Dy(2), and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Sr(1), two equivalent Dy(2), and two equivalent Fe(2) atoms to form distorted OSr2Dy2Fe2 octahedra that share corners with two equivalent O(4)Sr2Dy2Fe2 octahedra, corners with two equivalent O(1)SrDy4Fe octahedra, corners with four equivalent O(5)Dy4Fe2 octahedra, corners with four equivalent O(2)Sr4DyFe octahedra, edges with two equivalent O(4)Sr2Dy2Fe2 octahedra, faces with two equivalent O(5)Dy4Fe2 octahedra, faces with two equivalent O(2)Sr4DyFe octahedra, and faces with four equivalent O(4)Sr2Dy2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 15-54°. In the fifth O site, O(5) is bonded to four equivalent Dy(2), one Fe(1), and one Fe(2) atom to form distorted ODy4Fe2 octahedra that share  a cornercorner with one O(2)Sr4DyFe octahedra,  a cornercorner with one O(1)SrDy4Fe octahedra, corners with four equivalent O(5)Dy4Fe2 octahedra, corners with eight equivalent O(4)Sr2Dy2Fe2 octahedra, edges with four equivalent O(5)Dy4Fe2 octahedra, and faces with four equivalent O(4)Sr2Dy2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-53°.