MnFe4(BiO3)5 crystallizes in the triclinic P1 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(15), one O(20), one O(25), one O(30), one O(5), and one O(6) atom to form MnO6 octahedra that share corners with three equivalent Fe(7)O6 octahedra and corners with three equivalent Fe(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-33°. In the second Mn site, Mn(2) is bonded to one O(1), one O(11), one O(16), one O(21), one O(26), and one O(7) atom to form distorted MnO6 octahedra that share corners with three equivalent Fe(4)O6 octahedra and corners with three equivalent Fe(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-34°. There are eight inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(12), one O(17), one O(2), one O(22), one O(27), and one O(8) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 23-34°. In the second Fe site, Fe(2) is bonded to one O(13), one O(18), one O(23), one O(28), one O(3), and one O(9) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. In the third Fe site, Fe(3) is bonded to one O(10), one O(14), one O(19), one O(24), one O(29), and one O(4) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. In the fourth Fe site, Fe(4) is bonded to one O(11), one O(17), one O(2), one O(22), one O(26), and one O(7) atom to form distorted FeO6 octahedra that share corners with three equivalent Mn(2)O6 octahedra and corners with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-34°. In the fifth Fe site, Fe(5) is bonded to one O(12), one O(18), one O(23), one O(27), one O(3), and one O(8) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. In the sixth Fe site, Fe(6) is bonded to one O(13), one O(19), one O(24), one O(28), one O(4), and one O(9) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. In the seventh Fe site, Fe(7) is bonded to one O(10), one O(14), one O(20), one O(25), one O(29), and one O(5) atom to form distorted FeO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with three equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-33°. In the eighth Fe site, Fe(8) is bonded to one O(1), one O(15), one O(16), one O(21), one O(30), and one O(6) atom to form distorted FeO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with three equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-34°. There are ten inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(16), one O(21), one O(26), and one O(6) atom. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(12), one O(17), one O(2), one O(22), one O(27), and one O(7) atom. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(13), one O(18), one O(23), one O(28), one O(3), and one O(8) atom. In the fourth Bi site, Bi(4) is bonded in a 6-coordinate geometry to one O(14), one O(19), one O(24), one O(29), one O(4), and one O(9) atom. In the fifth Bi site, Bi(5) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(20), one O(25), one O(30), and one O(5) atom. In the sixth Bi site, Bi(6) is bonded in a 6-coordinate geometry to one O(10), one O(14), one O(20), one O(24), one O(29), and one O(5) atom. In the seventh Bi site, Bi(7) is bonded in a 6-coordinate geometry to one O(1), one O(15), one O(16), one O(25), one O(30), and one O(6) atom. In the eighth Bi site, Bi(8) is bonded in a 6-coordinate geometry to one O(11), one O(17), one O(2), one O(21), one O(26), and one O(7) atom. In the ninth Bi site, Bi(9) is bonded in a 6-coordinate geometry to one O(12), one O(18), one O(22), one O(27), one O(3), and one O(8) atom. In the tenth Bi site, Bi(10) is bonded in a 6-coordinate geometry to one O(13), one O(19), one O(23), one O(28), one O(4), and one O(9) atom. There are thirty inequivalent O sites. In the first O site, O(1) is bonded to one Mn(2), one Fe(8), one Bi(1), and one Bi(7) atom to form a mixture of distorted corner and edge-sharing OMnFeBi2 tetrahedra. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Fe(1), one Fe(4), one Bi(2), and one Bi(8) atom. In the third O site, O(3) is bonded in a distorted see-saw-like geometry to one Fe(2), one Fe(5), one Bi(3), and one Bi(9) atom. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Fe(3), one Fe(6), one Bi(10), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a distorted see-saw-like geometry to one Mn(1), one Fe(7), one Bi(5), and one Bi(6) atom. In the sixth O site, O(6) is bonded to one Mn(1), one Fe(8), one Bi(1), and one Bi(7) atom to form a mixture of distorted corner and edge-sharing OMnFeBi2 tetrahedra. In the seventh O site, O(7) is bonded to one Mn(2), one Fe(4), one Bi(2), and one Bi(8) atom to form distorted OMnFeBi2 tetrahedra that share  a cornercorner with one O(27)Fe2Bi2 tetrahedra,  a cornercorner with one O(1)MnFeBi2 tetrahedra, and corners with three equivalent O(26)MnFeBi2 tetrahedra. In the eighth O site, O(8) is bonded to one Fe(1), one Fe(5), one Bi(3), and one Bi(9) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the ninth O site, O(9) is bonded to one Fe(2), one Fe(6), one Bi(10), and one Bi(4) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the tenth O site, O(10) is bonded to one Fe(3), one Fe(7), one Bi(5), and one Bi(6) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Mn(2), one Fe(4), one Bi(1), and one Bi(8) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Fe(1), one Fe(5), one Bi(2), and one Bi(9) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one Fe(2), one Fe(6), one Bi(10), and one Bi(3) atom. In the fourteenth O site, O(14) is bonded in a 2-coordinate geometry to one Fe(3), one Fe(7), one Bi(4), and one Bi(6) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to one Mn(1), one Fe(8), one Bi(5), and one Bi(7) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Mn(2), one Fe(8), one Bi(1), and one Bi(7) atom. In the seventeenth O site, O(17) is bonded in a 4-coordinate geometry to one Fe(1), one Fe(4), one Bi(2), and one Bi(8) atom. In the eighteenth O site, O(18) is bonded in a 4-coordinate geometry to one Fe(2), one Fe(5), one Bi(3), and one Bi(9) atom. In the nineteenth O site, O(19) is bonded in a 4-coordinate geometry to one Fe(3), one Fe(6), one Bi(10), and one Bi(4) atom. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Mn(1), one Fe(7), one Bi(5), and one Bi(6) atom. In the twenty-first O site, O(21) is bonded in a 4-coordinate geometry to one Mn(2), one Fe(8), one Bi(1), and one Bi(8) atom. In the twenty-second O site, O(22) is bonded in a 4-coordinate geometry to one Fe(1), one Fe(4), one Bi(2), and one Bi(9) atom. In the twenty-third O site, O(23) is bonded in a 4-coordinate geometry to one Fe(2), one Fe(5), one Bi(10), and one Bi(3) atom. In the twenty-fourth O site, O(24) is bonded in a 4-coordinate geometry to one Fe(3), one Fe(6), one Bi(4), and one Bi(6) atom. In the twenty-fifth O site, O(25) is bonded in a 4-coordinate geometry to one Mn(1), one Fe(7), one Bi(5), and one Bi(7) atom. In the twenty-sixth O site, O(26) is bonded to one Mn(2), one Fe(4), one Bi(1), and one Bi(8) atom to form distorted corner-sharing OMnFeBi2 tetrahedra. In the twenty-seventh O site, O(27) is bonded to one Fe(1), one Fe(5), one Bi(2), and one Bi(9) atom to form distorted OFe2Bi2 tetrahedra that share  a cornercorner with one O(7)MnFeBi2 tetrahedra and corners with three equivalent O(8)Fe2Bi2 tetrahedra. In the twenty-eighth O site, O(28) is bonded to one Fe(2), one Fe(6), one Bi(10), and one Bi(3) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the twenty-ninth O site, O(29) is bonded to one Fe(3), one Fe(7), one Bi(4), and one Bi(6) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the thirtieth O site, O(30) is bonded in a distorted see-saw-like geometry to one Mn(1), one Fe(8), one Bi(5), and one Bi(7) atom.
MnFe4(BiO3)5 crystallizes in the triclinic P1 space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(15), one O(20), one O(25), one O(30), one O(5), and one O(6) atom to form MnO6 octahedra that share corners with three equivalent Fe(7)O6 octahedra and corners with three equivalent Fe(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-33°. The Mn(1)-O(15) bond length is 1.86 Å. The Mn(1)-O(20) bond length is 2.21 Å. The Mn(1)-O(25) bond length is 1.94 Å. The Mn(1)-O(30) bond length is 2.15 Å. The Mn(1)-O(5) bond length is 2.16 Å. The Mn(1)-O(6) bond length is 2.21 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(11), one O(16), one O(21), one O(26), and one O(7) atom to form distorted MnO6 octahedra that share corners with three equivalent Fe(4)O6 octahedra and corners with three equivalent Fe(8)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-34°. The Mn(2)-O(1) bond length is 2.10 Å. The Mn(2)-O(11) bond length is 1.86 Å. The Mn(2)-O(16) bond length is 2.00 Å. The Mn(2)-O(21) bond length is 1.82 Å. The Mn(2)-O(26) bond length is 2.22 Å. The Mn(2)-O(7) bond length is 2.04 Å. There are eight inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(12), one O(17), one O(2), one O(22), one O(27), and one O(8) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 23-34°. The Fe(1)-O(12) bond length is 1.86 Å. The Fe(1)-O(17) bond length is 2.14 Å. The Fe(1)-O(2) bond length is 2.19 Å. The Fe(1)-O(22) bond length is 1.98 Å. The Fe(1)-O(27) bond length is 2.30 Å. The Fe(1)-O(8) bond length is 2.07 Å. In the second Fe site, Fe(2) is bonded to one O(13), one O(18), one O(23), one O(28), one O(3), and one O(9) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. The Fe(2)-O(13) bond length is 1.86 Å. The Fe(2)-O(18) bond length is 2.13 Å. The Fe(2)-O(23) bond length is 1.97 Å. The Fe(2)-O(28) bond length is 2.28 Å. The Fe(2)-O(3) bond length is 2.19 Å. The Fe(2)-O(9) bond length is 2.07 Å. In the third Fe site, Fe(3) is bonded to one O(10), one O(14), one O(19), one O(24), one O(29), and one O(4) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. The Fe(3)-O(10) bond length is 2.07 Å. The Fe(3)-O(14) bond length is 1.86 Å. The Fe(3)-O(19) bond length is 2.15 Å. The Fe(3)-O(24) bond length is 1.98 Å. The Fe(3)-O(29) bond length is 2.29 Å. The Fe(3)-O(4) bond length is 2.19 Å. In the fourth Fe site, Fe(4) is bonded to one O(11), one O(17), one O(2), one O(22), one O(26), and one O(7) atom to form distorted FeO6 octahedra that share corners with three equivalent Mn(2)O6 octahedra and corners with three equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-34°. The Fe(4)-O(11) bond length is 1.93 Å. The Fe(4)-O(17) bond length is 2.02 Å. The Fe(4)-O(2) bond length is 2.33 Å. The Fe(4)-O(22) bond length is 1.83 Å. The Fe(4)-O(26) bond length is 2.23 Å. The Fe(4)-O(7) bond length is 2.15 Å. In the fifth Fe site, Fe(5) is bonded to one O(12), one O(18), one O(23), one O(27), one O(3), and one O(8) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. The Fe(5)-O(12) bond length is 1.91 Å. The Fe(5)-O(18) bond length is 2.02 Å. The Fe(5)-O(23) bond length is 1.83 Å. The Fe(5)-O(27) bond length is 2.25 Å. The Fe(5)-O(3) bond length is 2.33 Å. The Fe(5)-O(8) bond length is 2.13 Å. In the sixth Fe site, Fe(6) is bonded to one O(13), one O(19), one O(24), one O(28), one O(4), and one O(9) atom to form distorted corner-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 24-34°. The Fe(6)-O(13) bond length is 1.91 Å. The Fe(6)-O(19) bond length is 2.02 Å. The Fe(6)-O(24) bond length is 1.83 Å. The Fe(6)-O(28) bond length is 2.25 Å. The Fe(6)-O(4) bond length is 2.33 Å. The Fe(6)-O(9) bond length is 2.13 Å. In the seventh Fe site, Fe(7) is bonded to one O(10), one O(14), one O(20), one O(25), one O(29), and one O(5) atom to form distorted FeO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with three equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-33°. The Fe(7)-O(10) bond length is 2.12 Å. The Fe(7)-O(14) bond length is 1.92 Å. The Fe(7)-O(20) bond length is 1.97 Å. The Fe(7)-O(25) bond length is 1.83 Å. The Fe(7)-O(29) bond length is 2.25 Å. The Fe(7)-O(5) bond length is 2.36 Å. In the eighth Fe site, Fe(8) is bonded to one O(1), one O(15), one O(16), one O(21), one O(30), and one O(6) atom to form distorted FeO6 octahedra that share corners with three equivalent Mn(1)O6 octahedra and corners with three equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 22-34°. The Fe(8)-O(1) bond length is 2.47 Å. The Fe(8)-O(15) bond length is 1.94 Å. The Fe(8)-O(16) bond length is 2.08 Å. The Fe(8)-O(21) bond length is 1.92 Å. The Fe(8)-O(30) bond length is 2.37 Å. The Fe(8)-O(6) bond length is 2.07 Å. There are ten inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(1), one O(11), one O(16), one O(21), one O(26), and one O(6) atom. The Bi(1)-O(1) bond length is 2.52 Å. The Bi(1)-O(11) bond length is 2.79 Å. The Bi(1)-O(16) bond length is 2.46 Å. The Bi(1)-O(21) bond length is 2.32 Å. The Bi(1)-O(26) bond length is 2.24 Å. The Bi(1)-O(6) bond length is 2.32 Å. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to one O(12), one O(17), one O(2), one O(22), one O(27), and one O(7) atom. The Bi(2)-O(12) bond length is 2.78 Å. The Bi(2)-O(17) bond length is 2.47 Å. The Bi(2)-O(2) bond length is 2.53 Å. The Bi(2)-O(22) bond length is 2.30 Å. The Bi(2)-O(27) bond length is 2.12 Å. The Bi(2)-O(7) bond length is 2.43 Å. In the third Bi site, Bi(3) is bonded in a 6-coordinate geometry to one O(13), one O(18), one O(23), one O(28), one O(3), and one O(8) atom. The Bi(3)-O(13) bond length is 2.77 Å. The Bi(3)-O(18) bond length is 2.48 Å. The Bi(3)-O(23) bond length is 2.30 Å. The Bi(3)-O(28) bond length is 2.12 Å. The Bi(3)-O(3) bond length is 2.51 Å. The Bi(3)-O(8) bond length is 2.42 Å. In the fourth Bi site, Bi(4) is bonded in a 6-coordinate geometry to one O(14), one O(19), one O(24), one O(29), one O(4), and one O(9) atom. The Bi(4)-O(14) bond length is 2.76 Å. The Bi(4)-O(19) bond length is 2.48 Å. The Bi(4)-O(24) bond length is 2.32 Å. The Bi(4)-O(29) bond length is 2.11 Å. The Bi(4)-O(4) bond length is 2.51 Å. The Bi(4)-O(9) bond length is 2.42 Å. In the fifth Bi site, Bi(5) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(20), one O(25), one O(30), and one O(5) atom. The Bi(5)-O(10) bond length is 2.43 Å. The Bi(5)-O(15) bond length is 2.79 Å. The Bi(5)-O(20) bond length is 2.49 Å. The Bi(5)-O(25) bond length is 2.35 Å. The Bi(5)-O(30) bond length is 2.10 Å. The Bi(5)-O(5) bond length is 2.53 Å. In the sixth Bi site, Bi(6) is bonded in a 6-coordinate geometry to one O(10), one O(14), one O(20), one O(24), one O(29), and one O(5) atom. The Bi(6)-O(10) bond length is 2.29 Å. The Bi(6)-O(14) bond length is 2.42 Å. The Bi(6)-O(20) bond length is 2.55 Å. The Bi(6)-O(24) bond length is 2.68 Å. The Bi(6)-O(29) bond length is 2.44 Å. The Bi(6)-O(5) bond length is 2.24 Å. In the seventh Bi site, Bi(7) is bonded in a 6-coordinate geometry to one O(1), one O(15), one O(16), one O(25), one O(30), and one O(6) atom. The Bi(7)-O(1) bond length is 2.29 Å. The Bi(7)-O(15) bond length is 2.38 Å. The Bi(7)-O(16) bond length is 2.68 Å. The Bi(7)-O(25) bond length is 2.69 Å. The Bi(7)-O(30) bond length is 2.42 Å. The Bi(7)-O(6) bond length is 2.24 Å. In the eighth Bi site, Bi(8) is bonded in a 6-coordinate geometry to one O(11), one O(17), one O(2), one O(21), one O(26), and one O(7) atom. The Bi(8)-O(11) bond length is 2.43 Å. The Bi(8)-O(17) bond length is 2.60 Å. The Bi(8)-O(2) bond length is 2.21 Å. The Bi(8)-O(21) bond length is 2.65 Å. The Bi(8)-O(26) bond length is 2.42 Å. The Bi(8)-O(7) bond length is 2.34 Å. In the ninth Bi site, Bi(9) is bonded in a 6-coordinate geometry to one O(12), one O(18), one O(22), one O(27), one O(3), and one O(8) atom. The Bi(9)-O(12) bond length is 2.41 Å. The Bi(9)-O(18) bond length is 2.59 Å. The Bi(9)-O(22) bond length is 2.70 Å. The Bi(9)-O(27) bond length is 2.43 Å. The Bi(9)-O(3) bond length is 2.21 Å. The Bi(9)-O(8) bond length is 2.28 Å. In the tenth Bi site, Bi(10) is bonded in a 6-coordinate geometry to one O(13), one O(19), one O(23), one O(28), one O(4), and one O(9) atom. The Bi(10)-O(13) bond length is 2.42 Å. The Bi(10)-O(19) bond length is 2.57 Å. The Bi(10)-O(23) bond length is 2.69 Å. The Bi(10)-O(28) bond length is 2.43 Å. The Bi(10)-O(4) bond length is 2.22 Å. The Bi(10)-O(9) bond length is 2.28 Å. There are thirty inequivalent O sites. In the first O site, O(1) is bonded to one Mn(2), one Fe(8), one Bi(1), and one Bi(7) atom to form a mixture of distorted corner and edge-sharing OMnFeBi2 tetrahedra. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Fe(1), one Fe(4), one Bi(2), and one Bi(8) atom. In the third O site, O(3) is bonded in a distorted see-saw-like geometry to one Fe(2), one Fe(5), one Bi(3), and one Bi(9) atom. In the fourth O site, O(4) is bonded in a distorted see-saw-like geometry to one Fe(3), one Fe(6), one Bi(10), and one Bi(4) atom. In the fifth O site, O(5) is bonded in a distorted see-saw-like geometry to one Mn(1), one Fe(7), one Bi(5), and one Bi(6) atom. In the sixth O site, O(6) is bonded to one Mn(1), one Fe(8), one Bi(1), and one Bi(7) atom to form a mixture of distorted corner and edge-sharing OMnFeBi2 tetrahedra. In the seventh O site, O(7) is bonded to one Mn(2), one Fe(4), one Bi(2), and one Bi(8) atom to form distorted OMnFeBi2 tetrahedra that share  a cornercorner with one O(27)Fe2Bi2 tetrahedra,  a cornercorner with one O(1)MnFeBi2 tetrahedra, and corners with three equivalent O(26)MnFeBi2 tetrahedra. In the eighth O site, O(8) is bonded to one Fe(1), one Fe(5), one Bi(3), and one Bi(9) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the ninth O site, O(9) is bonded to one Fe(2), one Fe(6), one Bi(10), and one Bi(4) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the tenth O site, O(10) is bonded to one Fe(3), one Fe(7), one Bi(5), and one Bi(6) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the eleventh O site, O(11) is bonded in a 2-coordinate geometry to one Mn(2), one Fe(4), one Bi(1), and one Bi(8) atom. In the twelfth O site, O(12) is bonded in a 2-coordinate geometry to one Fe(1), one Fe(5), one Bi(2), and one Bi(9) atom. In the thirteenth O site, O(13) is bonded in a 2-coordinate geometry to one Fe(2), one Fe(6), one Bi(10), and one Bi(3) atom. In the fourteenth O site, O(14) is bonded in a 2-coordinate geometry to one Fe(3), one Fe(7), one Bi(4), and one Bi(6) atom. In the fifteenth O site, O(15) is bonded in a 2-coordinate geometry to one Mn(1), one Fe(8), one Bi(5), and one Bi(7) atom. In the sixteenth O site, O(16) is bonded in a 4-coordinate geometry to one Mn(2), one Fe(8), one Bi(1), and one Bi(7) atom. In the seventeenth O site, O(17) is bonded in a 4-coordinate geometry to one Fe(1), one Fe(4), one Bi(2), and one Bi(8) atom. In the eighteenth O site, O(18) is bonded in a 4-coordinate geometry to one Fe(2), one Fe(5), one Bi(3), and one Bi(9) atom. In the nineteenth O site, O(19) is bonded in a 4-coordinate geometry to one Fe(3), one Fe(6), one Bi(10), and one Bi(4) atom. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Mn(1), one Fe(7), one Bi(5), and one Bi(6) atom. In the twenty-first O site, O(21) is bonded in a 4-coordinate geometry to one Mn(2), one Fe(8), one Bi(1), and one Bi(8) atom. In the twenty-second O site, O(22) is bonded in a 4-coordinate geometry to one Fe(1), one Fe(4), one Bi(2), and one Bi(9) atom. In the twenty-third O site, O(23) is bonded in a 4-coordinate geometry to one Fe(2), one Fe(5), one Bi(10), and one Bi(3) atom. In the twenty-fourth O site, O(24) is bonded in a 4-coordinate geometry to one Fe(3), one Fe(6), one Bi(4), and one Bi(6) atom. In the twenty-fifth O site, O(25) is bonded in a 4-coordinate geometry to one Mn(1), one Fe(7), one Bi(5), and one Bi(7) atom. In the twenty-sixth O site, O(26) is bonded to one Mn(2), one Fe(4), one Bi(1), and one Bi(8) atom to form distorted corner-sharing OMnFeBi2 tetrahedra. In the twenty-seventh O site, O(27) is bonded to one Fe(1), one Fe(5), one Bi(2), and one Bi(9) atom to form distorted OFe2Bi2 tetrahedra that share  a cornercorner with one O(7)MnFeBi2 tetrahedra and corners with three equivalent O(8)Fe2Bi2 tetrahedra. In the twenty-eighth O site, O(28) is bonded to one Fe(2), one Fe(6), one Bi(10), and one Bi(3) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the twenty-ninth O site, O(29) is bonded to one Fe(3), one Fe(7), one Bi(4), and one Bi(6) atom to form distorted corner-sharing OFe2Bi2 tetrahedra. In the thirtieth O site, O(30) is bonded in a distorted see-saw-like geometry to one Mn(1), one Fe(8), one Bi(5), and one Bi(7) atom.