Cr4Mn5O12 is Spinel-like structured and crystallizes in the triclinic P-1 space group. There are five inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(7), and one O(9) atom to form CrO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra,  an edgeedge with one Cr(4)O6 octahedra,  an edgeedge with one Cr(5)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, and edges with two equivalent Cr(3)O6 octahedra. In the second Cr site, Cr(2) is bonded to two equivalent O(11), two equivalent O(2), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(4)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and edges with two equivalent Mn(6)O6 octahedra. In the third Cr site, Cr(3) is bonded to one O(1), one O(10), one O(12), one O(3), one O(4), and one O(6) atom to form CrO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra,  an edgeedge with one Cr(4)O6 octahedra,  an edgeedge with one Cr(5)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. In the fourth Cr site, Cr(4) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom to form CrO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra,  an edgeedge with one Cr(1)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Mn(6)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. In the fifth Cr site, Cr(5) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(9) atoms to form CrO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(2)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Cr(3)O6 octahedra, and edges with two equivalent Mn(5)O6 octahedra. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(11), one O(2), one O(4), and one O(7) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Cr(3)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, corners with three equivalent Cr(4)O6 octahedra, and corners with three equivalent Mn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-62°. In the second Mn site, Mn(2) is bonded to one O(1), one O(10), one O(6), and one O(9) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(4)O6 octahedra,  a cornercorner with one Mn(4)O6 octahedra, corners with two equivalent Cr(5)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra, and corners with three equivalent Cr(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-64°. In the third Mn site, Mn(3) is bonded to one O(12), one O(3), one O(5), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one Cr(5)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Mn(6)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Cr(3)O6 octahedra, corners with two equivalent Cr(4)O6 octahedra, and corners with two equivalent Mn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-64°. In the fourth Mn site, Mn(4) is bonded to one O(10), one O(11), one O(4), one O(5), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra,  an edgeedge with one Cr(1)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Mn(6)O6 octahedra, and edges with two equivalent Cr(4)O6 octahedra. In the fifth Mn site, Mn(5) is bonded to two equivalent O(12), two equivalent O(6), and two equivalent O(9) atoms to form MnO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(2)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Cr(3)O6 octahedra, and edges with two equivalent Cr(5)O6 octahedra. In the sixth Mn site, Mn(6) is bonded to two equivalent O(11), two equivalent O(2), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(2)O6 octahedra, edges with two equivalent Cr(4)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Cr(1), one Cr(3), one Cr(4), and one Mn(2) atom to form distorted OMnCr3 trigonal pyramids that share corners with two equivalent O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(10)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(2)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid, corners with two equivalent O(12)Mn2Cr2 trigonal pyramids, corners with two equivalent O(3)MnCr3 trigonal pyramids,  an edgeedge with one O(10)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(7)Mn2Cr2 trigonal pyramid. In the second O site, O(2) is bonded to one Cr(2), one Cr(4), one Mn(1), and one Mn(6) atom to form distorted OMn2Cr2 trigonal pyramids that share  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(1)MnCr3 trigonal pyramid, corners with two equivalent O(2)Mn2Cr2 trigonal pyramids, corners with two equivalent O(7)Mn2Cr2 trigonal pyramids, corners with three equivalent O(11)Mn3Cr trigonal pyramids,  an edgeedge with one O(11)Mn3Cr trigonal pyramid, and  an edgeedge with one O(8)Mn3Cr trigonal pyramid. In the third O site, O(3) is bonded to one Cr(1), one Cr(3), one Cr(5), and one Mn(3) atom to form distorted OMnCr3 trigonal pyramids that share  a cornercorner with one O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(7)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(10)Mn2Cr2 trigonal pyramids, corners with two equivalent O(1)MnCr3 trigonal pyramids,  an edgeedge with one O(6)Mn2Cr2 tetrahedra, and  an edgeedge with one O(12)Mn2Cr2 trigonal pyramid. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Cr(4), one Mn(1), and one Mn(4) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Cr(2), one Cr(4), one Mn(3), and one Mn(4) atom. In the sixth O site, O(6) is bonded to one Cr(3), one Cr(5), one Mn(2), and one Mn(5) atom to form distorted OMn2Cr2 tetrahedra that share corners with two equivalent O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(10)Mn2Cr2 trigonal pyramids, corners with two equivalent O(1)MnCr3 trigonal pyramids,  an edgeedge with one O(12)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(3)MnCr3 trigonal pyramid. In the seventh O site, O(7) is bonded to one Cr(1), one Cr(4), one Mn(1), and one Mn(4) atom to form distorted OMn2Cr2 trigonal pyramids that share  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(2)Mn2Cr2 trigonal pyramids, corners with two equivalent O(11)Mn3Cr trigonal pyramids, corners with two equivalent O(8)Mn3Cr trigonal pyramids,  an edgeedge with one O(10)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(1)MnCr3 trigonal pyramid. In the eighth O site, O(8) is bonded to one Cr(4), one Mn(3), one Mn(4), and one Mn(6) atom to form distorted OMn3Cr trigonal pyramids that share  a cornercorner with one O(10)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(2)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(11)Mn3Cr trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(1)MnCr3 trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(7)Mn2Cr2 trigonal pyramids,  an edgeedge with one O(2)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(11)Mn3Cr trigonal pyramid. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Cr(5), one Mn(2), and one Mn(5) atom. In the tenth O site, O(10) is bonded to one Cr(1), one Cr(3), one Mn(2), and one Mn(4) atom to form distorted OMn2Cr2 trigonal pyramids that share corners with two equivalent O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(11)Mn3Cr trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(1)MnCr3 trigonal pyramid, corners with two equivalent O(12)Mn2Cr2 trigonal pyramids, corners with two equivalent O(3)MnCr3 trigonal pyramids,  an edgeedge with one O(7)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(1)MnCr3 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Cr(2), one Mn(1), one Mn(4), and one Mn(6) atom to form distorted OMn3Cr trigonal pyramids that share  a cornercorner with one O(10)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid, corners with two equivalent O(7)Mn2Cr2 trigonal pyramids, corners with two equivalent O(11)Mn3Cr trigonal pyramids, corners with three equivalent O(2)Mn2Cr2 trigonal pyramids,  an edgeedge with one O(2)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(8)Mn3Cr trigonal pyramid. In the twelfth O site, O(12) is bonded to one Cr(1), one Cr(3), one Mn(3), and one Mn(5) atom to form distorted OMn2Cr2 trigonal pyramids that share  a cornercorner with one O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(7)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(10)Mn2Cr2 trigonal pyramids, corners with two equivalent O(1)MnCr3 trigonal pyramids,  an edgeedge with one O(6)Mn2Cr2 tetrahedra, and  an edgeedge with one O(3)MnCr3 trigonal pyramid.
Cr4Mn5O12 is Spinel-like structured and crystallizes in the triclinic P-1 space group. There are five inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(7), and one O(9) atom to form CrO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra,  an edgeedge with one Cr(4)O6 octahedra,  an edgeedge with one Cr(5)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, and edges with two equivalent Cr(3)O6 octahedra. The Cr(1)-O(1) bond length is 2.04 Å. The Cr(1)-O(10) bond length is 2.02 Å. The Cr(1)-O(12) bond length is 2.03 Å. The Cr(1)-O(3) bond length is 2.04 Å. The Cr(1)-O(7) bond length is 2.08 Å. The Cr(1)-O(9) bond length is 2.01 Å. In the second Cr site, Cr(2) is bonded to two equivalent O(11), two equivalent O(2), and two equivalent O(5) atoms to form CrO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(4)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and edges with two equivalent Mn(6)O6 octahedra. Both Cr(2)-O(11) bond lengths are 2.04 Å. Both Cr(2)-O(2) bond lengths are 2.05 Å. Both Cr(2)-O(5) bond lengths are 2.02 Å. In the third Cr site, Cr(3) is bonded to one O(1), one O(10), one O(12), one O(3), one O(4), and one O(6) atom to form CrO6 octahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra,  an edgeedge with one Cr(4)O6 octahedra,  an edgeedge with one Cr(5)O6 octahedra,  an edgeedge with one Mn(4)O6 octahedra,  an edgeedge with one Mn(5)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The Cr(3)-O(1) bond length is 2.04 Å. The Cr(3)-O(10) bond length is 2.04 Å. The Cr(3)-O(12) bond length is 2.04 Å. The Cr(3)-O(3) bond length is 2.04 Å. The Cr(3)-O(4) bond length is 2.02 Å. The Cr(3)-O(6) bond length is 2.07 Å. In the fourth Cr site, Cr(4) is bonded to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom to form CrO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra,  an edgeedge with one Cr(1)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Mn(6)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. The Cr(4)-O(1) bond length is 2.04 Å. The Cr(4)-O(2) bond length is 2.04 Å. The Cr(4)-O(4) bond length is 2.03 Å. The Cr(4)-O(5) bond length is 2.03 Å. The Cr(4)-O(7) bond length is 2.05 Å. The Cr(4)-O(8) bond length is 2.03 Å. In the fifth Cr site, Cr(5) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(9) atoms to form CrO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(2)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Cr(3)O6 octahedra, and edges with two equivalent Mn(5)O6 octahedra. Both Cr(5)-O(3) bond lengths are 2.05 Å. Both Cr(5)-O(6) bond lengths are 2.04 Å. Both Cr(5)-O(9) bond lengths are 2.03 Å. There are six inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(11), one O(2), one O(4), and one O(7) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(1)O6 octahedra,  a cornercorner with one Cr(3)O6 octahedra, corners with two equivalent Cr(2)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, corners with three equivalent Cr(4)O6 octahedra, and corners with three equivalent Mn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-62°. The Mn(1)-O(11) bond length is 2.08 Å. The Mn(1)-O(2) bond length is 2.08 Å. The Mn(1)-O(4) bond length is 2.05 Å. The Mn(1)-O(7) bond length is 2.08 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(10), one O(6), and one O(9) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(4)O6 octahedra,  a cornercorner with one Mn(4)O6 octahedra, corners with two equivalent Cr(5)O6 octahedra, corners with two equivalent Mn(5)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra, and corners with three equivalent Cr(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-64°. The Mn(2)-O(1) bond length is 2.08 Å. The Mn(2)-O(10) bond length is 2.06 Å. The Mn(2)-O(6) bond length is 2.08 Å. The Mn(2)-O(9) bond length is 2.04 Å. In the third Mn site, Mn(3) is bonded to one O(12), one O(3), one O(5), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Cr(2)O6 octahedra,  a cornercorner with one Cr(5)O6 octahedra,  a cornercorner with one Mn(5)O6 octahedra,  a cornercorner with one Mn(6)O6 octahedra, corners with two equivalent Cr(1)O6 octahedra, corners with two equivalent Cr(3)O6 octahedra, corners with two equivalent Cr(4)O6 octahedra, and corners with two equivalent Mn(4)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-64°. The Mn(3)-O(12) bond length is 2.06 Å. The Mn(3)-O(3) bond length is 2.08 Å. The Mn(3)-O(5) bond length is 2.05 Å. The Mn(3)-O(8) bond length is 2.06 Å. In the fourth Mn site, Mn(4) is bonded to one O(10), one O(11), one O(4), one O(5), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Mn(2)O4 tetrahedra, corners with two equivalent Mn(3)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra,  an edgeedge with one Cr(1)O6 octahedra,  an edgeedge with one Cr(2)O6 octahedra,  an edgeedge with one Cr(3)O6 octahedra,  an edgeedge with one Mn(6)O6 octahedra, and edges with two equivalent Cr(4)O6 octahedra. The Mn(4)-O(10) bond length is 2.07 Å. The Mn(4)-O(11) bond length is 2.13 Å. The Mn(4)-O(4) bond length is 2.16 Å. The Mn(4)-O(5) bond length is 2.15 Å. The Mn(4)-O(7) bond length is 1.98 Å. The Mn(4)-O(8) bond length is 1.95 Å. In the fifth Mn site, Mn(5) is bonded to two equivalent O(12), two equivalent O(6), and two equivalent O(9) atoms to form MnO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(2)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, edges with two equivalent Cr(3)O6 octahedra, and edges with two equivalent Cr(5)O6 octahedra. Both Mn(5)-O(12) bond lengths are 2.06 Å. Both Mn(5)-O(6) bond lengths are 1.99 Å. Both Mn(5)-O(9) bond lengths are 2.16 Å. In the sixth Mn site, Mn(6) is bonded to two equivalent O(11), two equivalent O(2), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with two equivalent Mn(3)O4 tetrahedra, corners with four equivalent Mn(1)O4 tetrahedra, edges with two equivalent Cr(2)O6 octahedra, edges with two equivalent Cr(4)O6 octahedra, and edges with two equivalent Mn(4)O6 octahedra. Both Mn(6)-O(11) bond lengths are 1.97 Å. Both Mn(6)-O(2) bond lengths are 2.09 Å. Both Mn(6)-O(8) bond lengths are 2.17 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Cr(1), one Cr(3), one Cr(4), and one Mn(2) atom to form distorted OMnCr3 trigonal pyramids that share corners with two equivalent O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(10)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(2)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid, corners with two equivalent O(12)Mn2Cr2 trigonal pyramids, corners with two equivalent O(3)MnCr3 trigonal pyramids,  an edgeedge with one O(10)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(7)Mn2Cr2 trigonal pyramid. In the second O site, O(2) is bonded to one Cr(2), one Cr(4), one Mn(1), and one Mn(6) atom to form distorted OMn2Cr2 trigonal pyramids that share  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(1)MnCr3 trigonal pyramid, corners with two equivalent O(2)Mn2Cr2 trigonal pyramids, corners with two equivalent O(7)Mn2Cr2 trigonal pyramids, corners with three equivalent O(11)Mn3Cr trigonal pyramids,  an edgeedge with one O(11)Mn3Cr trigonal pyramid, and  an edgeedge with one O(8)Mn3Cr trigonal pyramid. In the third O site, O(3) is bonded to one Cr(1), one Cr(3), one Cr(5), and one Mn(3) atom to form distorted OMnCr3 trigonal pyramids that share  a cornercorner with one O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(7)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(10)Mn2Cr2 trigonal pyramids, corners with two equivalent O(1)MnCr3 trigonal pyramids,  an edgeedge with one O(6)Mn2Cr2 tetrahedra, and  an edgeedge with one O(12)Mn2Cr2 trigonal pyramid. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Cr(3), one Cr(4), one Mn(1), and one Mn(4) atom. In the fifth O site, O(5) is bonded in a rectangular see-saw-like geometry to one Cr(2), one Cr(4), one Mn(3), and one Mn(4) atom. In the sixth O site, O(6) is bonded to one Cr(3), one Cr(5), one Mn(2), and one Mn(5) atom to form distorted OMn2Cr2 tetrahedra that share corners with two equivalent O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(10)Mn2Cr2 trigonal pyramids, corners with two equivalent O(1)MnCr3 trigonal pyramids,  an edgeedge with one O(12)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(3)MnCr3 trigonal pyramid. In the seventh O site, O(7) is bonded to one Cr(1), one Cr(4), one Mn(1), and one Mn(4) atom to form distorted OMn2Cr2 trigonal pyramids that share  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(2)Mn2Cr2 trigonal pyramids, corners with two equivalent O(11)Mn3Cr trigonal pyramids, corners with two equivalent O(8)Mn3Cr trigonal pyramids,  an edgeedge with one O(10)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(1)MnCr3 trigonal pyramid. In the eighth O site, O(8) is bonded to one Cr(4), one Mn(3), one Mn(4), and one Mn(6) atom to form distorted OMn3Cr trigonal pyramids that share  a cornercorner with one O(10)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(2)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(11)Mn3Cr trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(1)MnCr3 trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(7)Mn2Cr2 trigonal pyramids,  an edgeedge with one O(2)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(11)Mn3Cr trigonal pyramid. In the ninth O site, O(9) is bonded in a rectangular see-saw-like geometry to one Cr(1), one Cr(5), one Mn(2), and one Mn(5) atom. In the tenth O site, O(10) is bonded to one Cr(1), one Cr(3), one Mn(2), and one Mn(4) atom to form distorted OMn2Cr2 trigonal pyramids that share corners with two equivalent O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(11)Mn3Cr trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(1)MnCr3 trigonal pyramid, corners with two equivalent O(12)Mn2Cr2 trigonal pyramids, corners with two equivalent O(3)MnCr3 trigonal pyramids,  an edgeedge with one O(7)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(1)MnCr3 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Cr(2), one Mn(1), one Mn(4), and one Mn(6) atom to form distorted OMn3Cr trigonal pyramids that share  a cornercorner with one O(10)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid, corners with two equivalent O(7)Mn2Cr2 trigonal pyramids, corners with two equivalent O(11)Mn3Cr trigonal pyramids, corners with three equivalent O(2)Mn2Cr2 trigonal pyramids,  an edgeedge with one O(2)Mn2Cr2 trigonal pyramid, and  an edgeedge with one O(8)Mn3Cr trigonal pyramid. In the twelfth O site, O(12) is bonded to one Cr(1), one Cr(3), one Mn(3), and one Mn(5) atom to form distorted OMn2Cr2 trigonal pyramids that share  a cornercorner with one O(6)Mn2Cr2 tetrahedra,  a cornercorner with one O(12)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(7)Mn2Cr2 trigonal pyramid,  a cornercorner with one O(8)Mn3Cr trigonal pyramid,  a cornercorner with one O(3)MnCr3 trigonal pyramid, corners with two equivalent O(10)Mn2Cr2 trigonal pyramids, corners with two equivalent O(1)MnCr3 trigonal pyramids,  an edgeedge with one O(6)Mn2Cr2 tetrahedra, and  an edgeedge with one O(3)MnCr3 trigonal pyramid.