Ba4Sr(FeO3)5 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Fmm2 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to two equivalent O(14), two equivalent O(16), two equivalent O(17), two equivalent O(19), two equivalent O(3), and two equivalent O(4) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Ba(3)O12 cuboctahedra,  a faceface with one Sr(1)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(10)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, and faces with two equivalent Fe(3)O6 octahedra. In the second Ba site, Ba(2) is bonded to two equivalent O(13), two equivalent O(15), two equivalent O(18), two equivalent O(20), two equivalent O(5), and two equivalent O(6) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra,  a faceface with one Sr(1)O12 cuboctahedra, faces with four equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Fe(4)O6 octahedra, faces with two equivalent Fe(5)O6 octahedra, faces with two equivalent Fe(8)O6 octahedra, and faces with two equivalent Fe(9)O6 octahedra. In the third Ba site, Ba(3) is bonded to two equivalent O(11), two equivalent O(12), two equivalent O(17), two equivalent O(19), two equivalent O(7), and two equivalent O(8) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra, faces with four equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Fe(10)O6 octahedra, faces with two equivalent Fe(3)O6 octahedra, faces with two equivalent Fe(6)O6 octahedra, and faces with two equivalent Fe(7)O6 octahedra. In the fourth Ba site, Ba(4) is bonded to two equivalent O(10), two equivalent O(11), two equivalent O(12), two equivalent O(18), two equivalent O(20), and two equivalent O(9) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(3)O12 cuboctahedra, faces with four equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Fe(4)O6 octahedra, faces with two equivalent Fe(5)O6 octahedra, faces with two equivalent Fe(6)O6 octahedra, and faces with two equivalent Fe(7)O6 octahedra. Sr(1) is bonded to two equivalent O(1), two equivalent O(13), two equivalent O(14), two equivalent O(15), two equivalent O(16), and two equivalent O(2) atoms to form SrO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, faces with two equivalent Fe(8)O6 octahedra, and faces with two equivalent Fe(9)O6 octahedra. There are eleven inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), two equivalent O(14), and two equivalent O(16) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second Fe site, Fe(2) is bonded to one O(2), one O(4), two equivalent O(14), and two equivalent O(16) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(10)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the third Fe site, Fe(3) is bonded to one O(3), one O(7), two equivalent O(17), and two equivalent O(19) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra, corners with four equivalent Fe(10)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the fourth Fe site, Fe(4) is bonded to one O(5), one O(9), two equivalent O(18), and two equivalent O(20) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra, corners with four equivalent Fe(5)O6 octahedra, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the fifth Fe site, Fe(5) is bonded to one O(10), one O(6), two equivalent O(18), and two equivalent O(20) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra, corners with four equivalent Fe(4)O6 octahedra, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the sixth Fe site, Fe(6) is bonded to one O(7), one O(9), two equivalent O(11), and two equivalent O(12) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Fe(4)O6 octahedra, corners with four equivalent Fe(7)O6 octahedra, faces with four equivalent Ba(3)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the seventh Fe site, Fe(7) is bonded to one O(10), one O(8), two equivalent O(11), and two equivalent O(12) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(10)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra, corners with four equivalent Fe(6)O6 octahedra, faces with four equivalent Ba(3)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedra are not tilted. In the eighth Fe site, Fe(8) is bonded to one O(1), one O(6), two equivalent O(13), and two equivalent O(15) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra, corners with four equivalent Fe(9)O6 octahedra, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the ninth Fe site, Fe(9) is bonded to one O(2), one O(5), two equivalent O(13), and two equivalent O(15) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(4)O6 octahedra, corners with four equivalent Fe(8)O6 octahedra, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the tenth Fe site, Fe(10) is bonded to one O(4), one O(8), two equivalent O(17), and two equivalent O(19) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. In the eleventh Fe site, Fe(3) is bonded to one O(3), one O(7), two equivalent O(17), and two equivalent O(19) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra, corners with four equivalent Fe(10)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Sr(1), one Fe(1), and one Fe(8) atom. In the second O site, O(2) is bonded in a distorted linear geometry to four equivalent Sr(1), one Fe(2), and one Fe(9) atom. In the third O site, O(3) is bonded to four equivalent Ba(1), one Fe(1), and one Fe(3) atom to form distorted OBa4Fe2 octahedra that share  a cornercorner with one O(7)Ba4Fe2 octahedra, corners with four equivalent O(14)Ba2Sr2Fe2 octahedra, corners with four equivalent O(16)Ba2Sr2Fe2 octahedra, corners with four equivalent O(17)Ba4Fe2 octahedra, corners with four equivalent O(3)Ba4Fe2 octahedra, edges with four equivalent O(4)Ba4Fe2 octahedra, faces with two equivalent O(14)Ba2Sr2Fe2 octahedra, faces with two equivalent O(16)Ba2Sr2Fe2 octahedra, and faces with two equivalent O(17)Ba4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the fourth O site, O(4) is bonded to four equivalent Ba(1), one Fe(10), and one Fe(2) atom to form distorted OBa4Fe2 octahedra that share  a cornercorner with one O(8)Ba4Fe2 octahedra, corners with four equivalent O(14)Ba2Sr2Fe2 octahedra, corners with four equivalent O(16)Ba2Sr2Fe2 octahedra, corners with four equivalent O(17)Ba4Fe2 octahedra, corners with four equivalent O(4)Ba4Fe2 octahedra, edges with four equivalent O(3)Ba4Fe2 octahedra, faces with two equivalent O(14)Ba2Sr2Fe2 octahedra, faces with two equivalent O(16)Ba2Sr2Fe2 octahedra, and faces with two equivalent O(17)Ba4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the fifth O site, O(5) is bonded to four equivalent Ba(2), one Fe(4), and one Fe(9) atom to form distorted OBa4Fe2 octahedra that share  a cornercorner with one O(9)Ba4Fe2 octahedra, corners with four equivalent O(13)Ba2Sr2Fe2 octahedra, corners with four equivalent O(15)Ba2Sr2Fe2 octahedra, corners with four equivalent O(5)Ba4Fe2 octahedra, edges with four equivalent O(6)Ba4Fe2 octahedra, faces with two equivalent O(13)Ba2Sr2Fe2 octahedra, and faces with two equivalent O(15)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the sixth O site, O(6) is bonded to four equivalent Ba(2), one Fe(5), and one Fe(8) atom to form distorted OBa4Fe2 octahedra that share  a cornercorner with one O(10)Ba4Fe2 octahedra, corners with four equivalent O(13)Ba2Sr2Fe2 octahedra, corners with four equivalent O(15)Ba2Sr2Fe2 octahedra, corners with four equivalent O(6)Ba4Fe2 octahedra, edges with four equivalent O(5)Ba4Fe2 octahedra, faces with two equivalent O(13)Ba2Sr2Fe2 octahedra, and faces with two equivalent O(15)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the seventh O site, O(7) is bonded to four equivalent Ba(3), one Fe(3), and one Fe(6) atom to form a mixture of distorted corner, face, and edge-sharing OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the eighth O site, O(8) is bonded to four equivalent Ba(3), one Fe(10), and one Fe(7) atom to form a mixture of distorted corner, face, and edge-sharing OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-59°. In the ninth O site, O(9) is bonded to four equivalent Ba(4), one Fe(4), and one Fe(6) atom to form a mixture of distorted corner and edge-sharing OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the tenth O site, O(10) is bonded to four equivalent Ba(4), one Fe(5), and one Fe(7) atom to form a mixture of distorted corner and edge-sharing OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the eleventh O site, O(11) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(4), one Fe(6), and one Fe(7) atom. In the twelfth O site, O(12) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(4), one Fe(6), and one Fe(7) atom. In the thirteenth O site, O(13) is bonded to two equivalent Ba(2), two equivalent Sr(1), one Fe(8), and one Fe(9) atom to form distorted OBa2Sr2Fe2 octahedra that share corners with two equivalent O(13)Ba2Sr2Fe2 octahedra, corners with two equivalent O(14)Ba2Sr2Fe2 octahedra, corners with two equivalent O(5)Ba4Fe2 octahedra, corners with two equivalent O(6)Ba4Fe2 octahedra, corners with four equivalent O(16)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(14)Ba2Sr2Fe2 octahedra, edges with two equivalent O(13)Ba2Sr2Fe2 octahedra,  a faceface with one O(5)Ba4Fe2 octahedra,  a faceface with one O(6)Ba4Fe2 octahedra, and faces with four equivalent O(15)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 1-62°. In the fourteenth O site, O(14) is bonded to two equivalent Ba(1), two equivalent Sr(1), one Fe(1), and one Fe(2) atom to form distorted OBa2Sr2Fe2 octahedra that share corners with two equivalent O(13)Ba2Sr2Fe2 octahedra, corners with two equivalent O(14)Ba2Sr2Fe2 octahedra, corners with two equivalent O(17)Ba4Fe2 octahedra, corners with two equivalent O(3)Ba4Fe2 octahedra, corners with two equivalent O(4)Ba4Fe2 octahedra, corners with four equivalent O(15)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(13)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(17)Ba4Fe2 octahedra, edges with two equivalent O(14)Ba2Sr2Fe2 octahedra,  a faceface with one O(3)Ba4Fe2 octahedra,  a faceface with one O(4)Ba4Fe2 octahedra, and faces with four equivalent O(16)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°. In the fifteenth O site, O(15) is bonded to two equivalent Ba(2), two equivalent Sr(1), one Fe(8), and one Fe(9) atom to form distorted OBa2Sr2Fe2 octahedra that share corners with two equivalent O(15)Ba2Sr2Fe2 octahedra, corners with two equivalent O(16)Ba2Sr2Fe2 octahedra, corners with two equivalent O(5)Ba4Fe2 octahedra, corners with two equivalent O(6)Ba4Fe2 octahedra, corners with four equivalent O(14)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(16)Ba2Sr2Fe2 octahedra, edges with two equivalent O(15)Ba2Sr2Fe2 octahedra,  a faceface with one O(5)Ba4Fe2 octahedra,  a faceface with one O(6)Ba4Fe2 octahedra, and faces with four equivalent O(13)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the sixteenth O site, O(16) is bonded to two equivalent Ba(1), two equivalent Sr(1), one Fe(1), and one Fe(2) atom to form distorted OBa2Sr2Fe2 octahedra that share corners with two equivalent O(15)Ba2Sr2Fe2 octahedra, corners with two equivalent O(16)Ba2Sr2Fe2 octahedra, corners with two equivalent O(3)Ba4Fe2 octahedra, corners with two equivalent O(4)Ba4Fe2 octahedra, corners with four equivalent O(13)Ba2Sr2Fe2 octahedra, corners with four equivalent O(17)Ba4Fe2 octahedra,  an edgeedge with one O(15)Ba2Sr2Fe2 octahedra, edges with two equivalent O(16)Ba2Sr2Fe2 octahedra,  a faceface with one O(3)Ba4Fe2 octahedra,  a faceface with one O(4)Ba4Fe2 octahedra, and faces with four equivalent O(14)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the seventeenth O site, O(17) is bonded to two equivalent Ba(1), two equivalent Ba(3), one Fe(10), and one Fe(3) atom to form distorted OBa4Fe2 octahedra that share corners with two equivalent O(14)Ba2Sr2Fe2 octahedra, corners with two equivalent O(17)Ba4Fe2 octahedra, corners with two equivalent O(3)Ba4Fe2 octahedra, corners with two equivalent O(4)Ba4Fe2 octahedra, corners with two equivalent O(7)Ba4Fe2 octahedra, corners with two equivalent O(8)Ba4Fe2 octahedra, corners with four equivalent O(16)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(14)Ba2Sr2Fe2 octahedra, edges with two equivalent O(17)Ba4Fe2 octahedra,  a faceface with one O(3)Ba4Fe2 octahedra,  a faceface with one O(4)Ba4Fe2 octahedra,  a faceface with one O(7)Ba4Fe2 octahedra, and  a faceface with one O(8)Ba4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the eighteenth O site, O(18) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Ba(4), one Fe(4), and one Fe(5) atom. In the nineteenth O site, O(19) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(3), one Fe(10), and one Fe(3) atom. In the twentieth O site, O(20) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Ba(4), one Fe(4), and one Fe(5) atom.
Ba4Sr(FeO3)5 is (Cubic) Perovskite-derived structured and crystallizes in the orthorhombic Fmm2 space group. There are four inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to two equivalent O(14), two equivalent O(16), two equivalent O(17), two equivalent O(19), two equivalent O(3), and two equivalent O(4) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Ba(3)O12 cuboctahedra,  a faceface with one Sr(1)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(10)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, and faces with two equivalent Fe(3)O6 octahedra. Both Ba(1)-O(14) bond lengths are 2.90 Å. Both Ba(1)-O(16) bond lengths are 2.91 Å. Both Ba(1)-O(17) bond lengths are 2.85 Å. Both Ba(1)-O(19) bond lengths are 2.85 Å. Both Ba(1)-O(3) bond lengths are 2.84 Å. Both Ba(1)-O(4) bond lengths are 2.84 Å. In the second Ba site, Ba(2) is bonded to two equivalent O(13), two equivalent O(15), two equivalent O(18), two equivalent O(20), two equivalent O(5), and two equivalent O(6) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra,  a faceface with one Sr(1)O12 cuboctahedra, faces with four equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Fe(4)O6 octahedra, faces with two equivalent Fe(5)O6 octahedra, faces with two equivalent Fe(8)O6 octahedra, and faces with two equivalent Fe(9)O6 octahedra. Both Ba(2)-O(13) bond lengths are 2.90 Å. Both Ba(2)-O(15) bond lengths are 2.90 Å. Both Ba(2)-O(18) bond lengths are 2.88 Å. Both Ba(2)-O(20) bond lengths are 2.88 Å. Both Ba(2)-O(5) bond lengths are 2.84 Å. Both Ba(2)-O(6) bond lengths are 2.84 Å. In the third Ba site, Ba(3) is bonded to two equivalent O(11), two equivalent O(12), two equivalent O(17), two equivalent O(19), two equivalent O(7), and two equivalent O(8) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(4)O12 cuboctahedra, faces with four equivalent Ba(3)O12 cuboctahedra, faces with two equivalent Fe(10)O6 octahedra, faces with two equivalent Fe(3)O6 octahedra, faces with two equivalent Fe(6)O6 octahedra, and faces with two equivalent Fe(7)O6 octahedra. Both Ba(3)-O(11) bond lengths are 2.85 Å. Both Ba(3)-O(12) bond lengths are 2.85 Å. Both Ba(3)-O(17) bond lengths are 2.88 Å. Both Ba(3)-O(19) bond lengths are 2.88 Å. Both Ba(3)-O(7) bond lengths are 2.84 Å. Both Ba(3)-O(8) bond lengths are 2.84 Å. In the fourth Ba site, Ba(4) is bonded to two equivalent O(10), two equivalent O(11), two equivalent O(12), two equivalent O(18), two equivalent O(20), and two equivalent O(9) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Ba(3)O12 cuboctahedra, corners with four equivalent Ba(4)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra,  a faceface with one Ba(3)O12 cuboctahedra, faces with four equivalent Ba(4)O12 cuboctahedra, faces with two equivalent Fe(4)O6 octahedra, faces with two equivalent Fe(5)O6 octahedra, faces with two equivalent Fe(6)O6 octahedra, and faces with two equivalent Fe(7)O6 octahedra. Both Ba(4)-O(10) bond lengths are 2.84 Å. Both Ba(4)-O(11) bond lengths are 2.86 Å. Both Ba(4)-O(12) bond lengths are 2.86 Å. Both Ba(4)-O(18) bond lengths are 2.88 Å. Both Ba(4)-O(20) bond lengths are 2.88 Å. Both Ba(4)-O(9) bond lengths are 2.84 Å. Sr(1) is bonded to two equivalent O(1), two equivalent O(13), two equivalent O(14), two equivalent O(15), two equivalent O(16), and two equivalent O(2) atoms to form SrO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with four equivalent Ba(2)O12 cuboctahedra, corners with four equivalent Sr(1)O12 cuboctahedra,  a faceface with one Ba(1)O12 cuboctahedra,  a faceface with one Ba(2)O12 cuboctahedra, faces with four equivalent Sr(1)O12 cuboctahedra, faces with two equivalent Fe(1)O6 octahedra, faces with two equivalent Fe(2)O6 octahedra, faces with two equivalent Fe(8)O6 octahedra, and faces with two equivalent Fe(9)O6 octahedra. Both Sr(1)-O(1) bond lengths are 2.84 Å. Both Sr(1)-O(13) bond lengths are 2.74 Å. Both Sr(1)-O(14) bond lengths are 2.76 Å. Both Sr(1)-O(15) bond lengths are 2.75 Å. Both Sr(1)-O(16) bond lengths are 2.76 Å. Both Sr(1)-O(2) bond lengths are 2.84 Å. There are eleven inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(3), two equivalent O(14), and two equivalent O(16) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra, corners with four equivalent Fe(2)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. The Fe(1)-O(1) bond length is 1.89 Å. The Fe(1)-O(3) bond length is 1.91 Å. Both Fe(1)-O(14) bond lengths are 1.98 Å. Both Fe(1)-O(16) bond lengths are 2.00 Å. In the second Fe site, Fe(2) is bonded to one O(2), one O(4), two equivalent O(14), and two equivalent O(16) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(10)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-4°. The Fe(2)-O(2) bond length is 1.96 Å. The Fe(2)-O(4) bond length is 1.95 Å. Both Fe(2)-O(14) bond lengths are 2.04 Å. Both Fe(2)-O(16) bond lengths are 2.02 Å. In the third Fe site, Fe(3) is bonded to one O(3), one O(7), two equivalent O(17), and two equivalent O(19) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra, corners with four equivalent Fe(10)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Fe(3)-O(3) bond length is 2.23 Å. The Fe(3)-O(7) bond length is 2.04 Å. Both Fe(3)-O(17) bond lengths are 2.00 Å. Both Fe(3)-O(19) bond lengths are 2.00 Å. In the fourth Fe site, Fe(4) is bonded to one O(5), one O(9), two equivalent O(18), and two equivalent O(20) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(6)O6 octahedra,  a cornercorner with one Fe(9)O6 octahedra, corners with four equivalent Fe(5)O6 octahedra, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. The Fe(4)-O(5) bond length is 2.16 Å. The Fe(4)-O(9) bond length is 2.05 Å. Both Fe(4)-O(18) bond lengths are 2.02 Å. Both Fe(4)-O(20) bond lengths are 2.02 Å. In the fifth Fe site, Fe(5) is bonded to one O(10), one O(6), two equivalent O(18), and two equivalent O(20) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(7)O6 octahedra,  a cornercorner with one Fe(8)O6 octahedra, corners with four equivalent Fe(4)O6 octahedra, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. The Fe(5)-O(10) bond length is 2.26 Å. The Fe(5)-O(6) bond length is 2.01 Å. Both Fe(5)-O(18) bond lengths are 1.99 Å. Both Fe(5)-O(20) bond lengths are 1.99 Å. In the sixth Fe site, Fe(6) is bonded to one O(7), one O(9), two equivalent O(11), and two equivalent O(12) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(3)O6 octahedra,  a cornercorner with one Fe(4)O6 octahedra, corners with four equivalent Fe(7)O6 octahedra, faces with four equivalent Ba(3)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedra are not tilted. The Fe(6)-O(7) bond length is 1.98 Å. The Fe(6)-O(9) bond length is 2.02 Å. Both Fe(6)-O(11) bond lengths are 2.02 Å. Both Fe(6)-O(12) bond lengths are 2.03 Å. In the seventh Fe site, Fe(7) is bonded to one O(10), one O(8), two equivalent O(11), and two equivalent O(12) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(10)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra, corners with four equivalent Fe(6)O6 octahedra, faces with four equivalent Ba(3)O12 cuboctahedra, and faces with four equivalent Ba(4)O12 cuboctahedra. The corner-sharing octahedra are not tilted. The Fe(7)-O(10) bond length is 1.90 Å. The Fe(7)-O(8) bond length is 1.97 Å. Both Fe(7)-O(11) bond lengths are 1.99 Å. Both Fe(7)-O(12) bond lengths are 1.98 Å. In the eighth Fe site, Fe(8) is bonded to one O(1), one O(6), two equivalent O(13), and two equivalent O(15) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(5)O6 octahedra, corners with four equivalent Fe(9)O6 octahedra, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-5°. The Fe(8)-O(1) bond length is 2.05 Å. The Fe(8)-O(6) bond length is 1.98 Å. Both Fe(8)-O(13) bond lengths are 2.00 Å. Both Fe(8)-O(15) bond lengths are 2.00 Å. In the ninth Fe site, Fe(9) is bonded to one O(2), one O(5), two equivalent O(13), and two equivalent O(15) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(4)O6 octahedra, corners with four equivalent Fe(8)O6 octahedra, faces with four equivalent Ba(2)O12 cuboctahedra, and faces with four equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-5°. The Fe(9)-O(2) bond length is 1.96 Å. The Fe(9)-O(5) bond length is 1.95 Å. Both Fe(9)-O(13) bond lengths are 2.02 Å. Both Fe(9)-O(15) bond lengths are 2.01 Å. In the tenth Fe site, Fe(10) is bonded to one O(4), one O(8), two equivalent O(17), and two equivalent O(19) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(2)O6 octahedra,  a cornercorner with one Fe(7)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Fe(10)-O(4) bond length is 2.11 Å. The Fe(10)-O(8) bond length is 2.13 Å. Both Fe(10)-O(17) bond lengths are 2.01 Å. Both Fe(10)-O(19) bond lengths are 2.01 Å. In the eleventh Fe site, Fe(3) is bonded to one O(3), one O(7), two equivalent O(17), and two equivalent O(19) atoms to form FeO6 octahedra that share  a cornercorner with one Fe(1)O6 octahedra,  a cornercorner with one Fe(6)O6 octahedra, corners with four equivalent Fe(10)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ba(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-2°. The Fe(3)-O(3) bond length is 2.23 Å. The Fe(3)-O(7) bond length is 2.04 Å. Both Fe(3)-O(17) bond lengths are 2.00 Å. Both Fe(3)-O(19) bond lengths are 2.00 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to four equivalent Sr(1), one Fe(1), and one Fe(8) atom. In the second O site, O(2) is bonded in a distorted linear geometry to four equivalent Sr(1), one Fe(2), and one Fe(9) atom. In the third O site, O(3) is bonded to four equivalent Ba(1), one Fe(1), and one Fe(3) atom to form distorted OBa4Fe2 octahedra that share  a cornercorner with one O(7)Ba4Fe2 octahedra, corners with four equivalent O(14)Ba2Sr2Fe2 octahedra, corners with four equivalent O(16)Ba2Sr2Fe2 octahedra, corners with four equivalent O(17)Ba4Fe2 octahedra, corners with four equivalent O(3)Ba4Fe2 octahedra, edges with four equivalent O(4)Ba4Fe2 octahedra, faces with two equivalent O(14)Ba2Sr2Fe2 octahedra, faces with two equivalent O(16)Ba2Sr2Fe2 octahedra, and faces with two equivalent O(17)Ba4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the fourth O site, O(4) is bonded to four equivalent Ba(1), one Fe(10), and one Fe(2) atom to form distorted OBa4Fe2 octahedra that share  a cornercorner with one O(8)Ba4Fe2 octahedra, corners with four equivalent O(14)Ba2Sr2Fe2 octahedra, corners with four equivalent O(16)Ba2Sr2Fe2 octahedra, corners with four equivalent O(17)Ba4Fe2 octahedra, corners with four equivalent O(4)Ba4Fe2 octahedra, edges with four equivalent O(3)Ba4Fe2 octahedra, faces with two equivalent O(14)Ba2Sr2Fe2 octahedra, faces with two equivalent O(16)Ba2Sr2Fe2 octahedra, and faces with two equivalent O(17)Ba4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the fifth O site, O(5) is bonded to four equivalent Ba(2), one Fe(4), and one Fe(9) atom to form distorted OBa4Fe2 octahedra that share  a cornercorner with one O(9)Ba4Fe2 octahedra, corners with four equivalent O(13)Ba2Sr2Fe2 octahedra, corners with four equivalent O(15)Ba2Sr2Fe2 octahedra, corners with four equivalent O(5)Ba4Fe2 octahedra, edges with four equivalent O(6)Ba4Fe2 octahedra, faces with two equivalent O(13)Ba2Sr2Fe2 octahedra, and faces with two equivalent O(15)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-62°. In the sixth O site, O(6) is bonded to four equivalent Ba(2), one Fe(5), and one Fe(8) atom to form distorted OBa4Fe2 octahedra that share  a cornercorner with one O(10)Ba4Fe2 octahedra, corners with four equivalent O(13)Ba2Sr2Fe2 octahedra, corners with four equivalent O(15)Ba2Sr2Fe2 octahedra, corners with four equivalent O(6)Ba4Fe2 octahedra, edges with four equivalent O(5)Ba4Fe2 octahedra, faces with two equivalent O(13)Ba2Sr2Fe2 octahedra, and faces with two equivalent O(15)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-61°. In the seventh O site, O(7) is bonded to four equivalent Ba(3), one Fe(3), and one Fe(6) atom to form a mixture of distorted corner, face, and edge-sharing OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the eighth O site, O(8) is bonded to four equivalent Ba(3), one Fe(10), and one Fe(7) atom to form a mixture of distorted corner, face, and edge-sharing OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-59°. In the ninth O site, O(9) is bonded to four equivalent Ba(4), one Fe(4), and one Fe(6) atom to form a mixture of distorted corner and edge-sharing OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the tenth O site, O(10) is bonded to four equivalent Ba(4), one Fe(5), and one Fe(7) atom to form a mixture of distorted corner and edge-sharing OBa4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-5°. In the eleventh O site, O(11) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(4), one Fe(6), and one Fe(7) atom. In the twelfth O site, O(12) is bonded in a distorted linear geometry to two equivalent Ba(3), two equivalent Ba(4), one Fe(6), and one Fe(7) atom. In the thirteenth O site, O(13) is bonded to two equivalent Ba(2), two equivalent Sr(1), one Fe(8), and one Fe(9) atom to form distorted OBa2Sr2Fe2 octahedra that share corners with two equivalent O(13)Ba2Sr2Fe2 octahedra, corners with two equivalent O(14)Ba2Sr2Fe2 octahedra, corners with two equivalent O(5)Ba4Fe2 octahedra, corners with two equivalent O(6)Ba4Fe2 octahedra, corners with four equivalent O(16)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(14)Ba2Sr2Fe2 octahedra, edges with two equivalent O(13)Ba2Sr2Fe2 octahedra,  a faceface with one O(5)Ba4Fe2 octahedra,  a faceface with one O(6)Ba4Fe2 octahedra, and faces with four equivalent O(15)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 1-62°. In the fourteenth O site, O(14) is bonded to two equivalent Ba(1), two equivalent Sr(1), one Fe(1), and one Fe(2) atom to form distorted OBa2Sr2Fe2 octahedra that share corners with two equivalent O(13)Ba2Sr2Fe2 octahedra, corners with two equivalent O(14)Ba2Sr2Fe2 octahedra, corners with two equivalent O(17)Ba4Fe2 octahedra, corners with two equivalent O(3)Ba4Fe2 octahedra, corners with two equivalent O(4)Ba4Fe2 octahedra, corners with four equivalent O(15)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(13)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(17)Ba4Fe2 octahedra, edges with two equivalent O(14)Ba2Sr2Fe2 octahedra,  a faceface with one O(3)Ba4Fe2 octahedra,  a faceface with one O(4)Ba4Fe2 octahedra, and faces with four equivalent O(16)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 1-63°. In the fifteenth O site, O(15) is bonded to two equivalent Ba(2), two equivalent Sr(1), one Fe(8), and one Fe(9) atom to form distorted OBa2Sr2Fe2 octahedra that share corners with two equivalent O(15)Ba2Sr2Fe2 octahedra, corners with two equivalent O(16)Ba2Sr2Fe2 octahedra, corners with two equivalent O(5)Ba4Fe2 octahedra, corners with two equivalent O(6)Ba4Fe2 octahedra, corners with four equivalent O(14)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(16)Ba2Sr2Fe2 octahedra, edges with two equivalent O(15)Ba2Sr2Fe2 octahedra,  a faceface with one O(5)Ba4Fe2 octahedra,  a faceface with one O(6)Ba4Fe2 octahedra, and faces with four equivalent O(13)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the sixteenth O site, O(16) is bonded to two equivalent Ba(1), two equivalent Sr(1), one Fe(1), and one Fe(2) atom to form distorted OBa2Sr2Fe2 octahedra that share corners with two equivalent O(15)Ba2Sr2Fe2 octahedra, corners with two equivalent O(16)Ba2Sr2Fe2 octahedra, corners with two equivalent O(3)Ba4Fe2 octahedra, corners with two equivalent O(4)Ba4Fe2 octahedra, corners with four equivalent O(13)Ba2Sr2Fe2 octahedra, corners with four equivalent O(17)Ba4Fe2 octahedra,  an edgeedge with one O(15)Ba2Sr2Fe2 octahedra, edges with two equivalent O(16)Ba2Sr2Fe2 octahedra,  a faceface with one O(3)Ba4Fe2 octahedra,  a faceface with one O(4)Ba4Fe2 octahedra, and faces with four equivalent O(14)Ba2Sr2Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-63°. In the seventeenth O site, O(17) is bonded to two equivalent Ba(1), two equivalent Ba(3), one Fe(10), and one Fe(3) atom to form distorted OBa4Fe2 octahedra that share corners with two equivalent O(14)Ba2Sr2Fe2 octahedra, corners with two equivalent O(17)Ba4Fe2 octahedra, corners with two equivalent O(3)Ba4Fe2 octahedra, corners with two equivalent O(4)Ba4Fe2 octahedra, corners with two equivalent O(7)Ba4Fe2 octahedra, corners with two equivalent O(8)Ba4Fe2 octahedra, corners with four equivalent O(16)Ba2Sr2Fe2 octahedra,  an edgeedge with one O(14)Ba2Sr2Fe2 octahedra, edges with two equivalent O(17)Ba4Fe2 octahedra,  a faceface with one O(3)Ba4Fe2 octahedra,  a faceface with one O(4)Ba4Fe2 octahedra,  a faceface with one O(7)Ba4Fe2 octahedra, and  a faceface with one O(8)Ba4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 0-60°. In the eighteenth O site, O(18) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Ba(4), one Fe(4), and one Fe(5) atom. In the nineteenth O site, O(19) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ba(3), one Fe(10), and one Fe(3) atom. In the twentieth O site, O(20) is bonded in a distorted linear geometry to two equivalent Ba(2), two equivalent Ba(4), one Fe(4), and one Fe(5) atom.