Ba2Dy2Co4O11 crystallizes in the orthorhombic Pmmm space group. Ba(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(5), and four equivalent O(6) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Co(1)O6 octahedra, and faces with four equivalent Co(2)O5 trigonal bipyramids. Dy(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and four equivalent O(6) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(4), one O(5), two equivalent O(2), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O5 trigonal bipyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-11°. In the second Co site, Co(2) is bonded to one O(3), two equivalent O(1), and two equivalent O(6) atoms to form distorted CoO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O5 trigonal bipyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 20°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Dy(1), and two equivalent Co(2) atoms. In the second O site, O(2) is bonded to two equivalent Ba(1), two equivalent Dy(1), and two equivalent Co(1) atoms to form distorted OBa2Dy2Co2 octahedra that share corners with two equivalent O(2)Ba2Dy2Co2 octahedra, corners with four equivalent O(3)Ba4Co2 octahedra, edges with two equivalent O(2)Ba2Dy2Co2 octahedra, and faces with two equivalent O(5)Ba4Co2 octahedra. The corner-sharing octahedral tilt angles range from 11-62°. In the third O site, O(3) is bonded to four equivalent Ba(1) and two equivalent Co(2) atoms to form OBa4Co2 octahedra that share corners with four equivalent O(5)Ba4Co2 octahedra, corners with eight equivalent O(2)Ba2Dy2Co2 octahedra, edges with two equivalent O(3)Ba4Co2 octahedra, and edges with two equivalent O(5)Ba4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Dy(1) and two equivalent Co(1) atoms. In the fifth O site, O(5) is bonded to four equivalent Ba(1) and two equivalent Co(1) atoms to form distorted OBa4Co2 octahedra that share corners with four equivalent O(3)Ba4Co2 octahedra, edges with two equivalent O(3)Ba4Co2 octahedra, edges with two equivalent O(5)Ba4Co2 octahedra, and faces with four equivalent O(2)Ba2Dy2Co2 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Dy(1), one Co(1), and one Co(2) atom.
Ba2Dy2Co4O11 crystallizes in the orthorhombic Pmmm space group. Ba(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(3), two equivalent O(5), and four equivalent O(6) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Co(1)O6 octahedra, and faces with four equivalent Co(2)O5 trigonal bipyramids. Both Ba(1)-O(1) bond lengths are 3.14 Å. Both Ba(1)-O(2) bond lengths are 2.90 Å. Both Ba(1)-O(3) bond lengths are 2.77 Å. Both Ba(1)-O(5) bond lengths are 2.76 Å. All Ba(1)-O(6) bond lengths are 3.05 Å. Dy(1) is bonded in a 10-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and four equivalent O(6) atoms. Both Dy(1)-O(1) bond lengths are 2.54 Å. Both Dy(1)-O(2) bond lengths are 2.46 Å. Both Dy(1)-O(4) bond lengths are 2.65 Å. All Dy(1)-O(6) bond lengths are 2.50 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(4), one O(5), two equivalent O(2), and two equivalent O(6) atoms to form CoO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with two equivalent Co(2)O5 trigonal bipyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-11°. The Co(1)-O(4) bond length is 1.88 Å. The Co(1)-O(5) bond length is 1.97 Å. Both Co(1)-O(2) bond lengths are 1.97 Å. Both Co(1)-O(6) bond lengths are 2.12 Å. In the second Co site, Co(2) is bonded to one O(3), two equivalent O(1), and two equivalent O(6) atoms to form distorted CoO5 trigonal bipyramids that share corners with two equivalent Co(1)O6 octahedra, corners with three equivalent Co(2)O5 trigonal bipyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 20°. The Co(2)-O(3) bond length is 2.00 Å. Both Co(2)-O(1) bond lengths are 2.01 Å. Both Co(2)-O(6) bond lengths are 1.83 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Dy(1), and two equivalent Co(2) atoms. In the second O site, O(2) is bonded to two equivalent Ba(1), two equivalent Dy(1), and two equivalent Co(1) atoms to form distorted OBa2Dy2Co2 octahedra that share corners with two equivalent O(2)Ba2Dy2Co2 octahedra, corners with four equivalent O(3)Ba4Co2 octahedra, edges with two equivalent O(2)Ba2Dy2Co2 octahedra, and faces with two equivalent O(5)Ba4Co2 octahedra. The corner-sharing octahedral tilt angles range from 11-62°. In the third O site, O(3) is bonded to four equivalent Ba(1) and two equivalent Co(2) atoms to form OBa4Co2 octahedra that share corners with four equivalent O(5)Ba4Co2 octahedra, corners with eight equivalent O(2)Ba2Dy2Co2 octahedra, edges with two equivalent O(3)Ba4Co2 octahedra, and edges with two equivalent O(5)Ba4Co2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Dy(1) and two equivalent Co(1) atoms. In the fifth O site, O(5) is bonded to four equivalent Ba(1) and two equivalent Co(1) atoms to form distorted OBa4Co2 octahedra that share corners with four equivalent O(3)Ba4Co2 octahedra, edges with two equivalent O(3)Ba4Co2 octahedra, edges with two equivalent O(5)Ba4Co2 octahedra, and faces with four equivalent O(2)Ba2Dy2Co2 octahedra. The corner-sharing octahedra are not tilted. In the sixth O site, O(6) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Dy(1), one Co(1), and one Co(2) atom.