MgZn4(Fe2O5)2 crystallizes in the monoclinic Pm space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(9) atoms. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(4), and two equivalent O(8) atoms to form FeO4 tetrahedra that share  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, and corners with two equivalent Zn(4)O4 trigonal pyramids. In the second Fe site, Fe(2) is bonded to one O(1), one O(3), and two equivalent O(10) atoms to form FeO4 tetrahedra that share  a cornercorner with one Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, corners with two equivalent Zn(2)O4 trigonal pyramids, and corners with two equivalent Zn(4)O4 trigonal pyramids. In the third Fe site, Fe(3) is bonded to one O(2), one O(9), and two equivalent O(5) atoms to form distorted FeO4 tetrahedra that share  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 trigonal pyramids, and corners with two equivalent Zn(4)O4 trigonal pyramids. In the fourth Fe site, Fe(4) is bonded to one O(7), one O(9), and two equivalent O(6) atoms to form FeO4 tetrahedra that share  a cornercorner with one Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, and corners with two equivalent Zn(2)O4 trigonal pyramids. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form ZnO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, and  an edgeedge with one Zn(2)O4 trigonal pyramid. In the second Zn site, Zn(2) is bonded to one O(5), one O(6), and two equivalent O(3) atoms to form ZnO4 trigonal pyramids that share corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Zn(2)O4 trigonal pyramids, and  an edgeedge with one Zn(1)O4 tetrahedra. In the third Zn site, Zn(3) is bonded to one O(10), one O(8), and two equivalent O(7) atoms to form ZnO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, and  an edgeedge with one Zn(4)O4 trigonal pyramid. In the fourth Zn site, Zn(4) is bonded to one O(10), one O(8), and two equivalent O(2) atoms to form ZnO4 trigonal pyramids that share corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Zn(4)O4 trigonal pyramids, and  an edgeedge with one Zn(3)O4 tetrahedra. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one Fe(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Fe(3), and two equivalent Zn(4) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Fe(2), and two equivalent Zn(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Zn(1) atoms. In the fifth O site, O(5) is bonded to two equivalent Fe(3), one Zn(1), and one Zn(2) atom to form OZn2Fe2 tetrahedra that share corners with two equivalent O(9)Mg2Fe2 tetrahedra, corners with two equivalent O(5)Zn2Fe2 tetrahedra, and  an edgeedge with one O(6)Zn2Fe2 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Fe(4), one Zn(1), and one Zn(2) atom to form OZn2Fe2 tetrahedra that share corners with two equivalent O(9)Mg2Fe2 tetrahedra, corners with two equivalent O(6)Zn2Fe2 tetrahedra, and  an edgeedge with one O(5)Zn2Fe2 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Fe(4) and two equivalent Zn(3) atoms. In the eighth O site, O(8) is bonded to two equivalent Fe(1), one Zn(3), and one Zn(4) atom to form a mixture of edge and corner-sharing OZn2Fe2 tetrahedra. In the ninth O site, O(9) is bonded to two equivalent Mg(1), one Fe(3), and one Fe(4) atom to form distorted OMg2Fe2 tetrahedra that share corners with two equivalent O(9)Mg2Fe2 tetrahedra, corners with two equivalent O(5)Zn2Fe2 tetrahedra, and corners with two equivalent O(6)Zn2Fe2 tetrahedra. In the tenth O site, O(10) is bonded to two equivalent Fe(2), one Zn(3), and one Zn(4) atom to form a mixture of edge and corner-sharing OZn2Fe2 tetrahedra.
MgZn4(Fe2O5)2 crystallizes in the monoclinic Pm space group. Mg(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(9) atoms. Both Mg(1)-O(2) bond lengths are 2.46 Å. Both Mg(1)-O(3) bond lengths are 2.40 Å. Both Mg(1)-O(9) bond lengths are 2.07 Å. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(4), and two equivalent O(8) atoms to form FeO4 tetrahedra that share  a cornercorner with one Fe(2)O4 tetrahedra, corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, and corners with two equivalent Zn(4)O4 trigonal pyramids. The Fe(1)-O(1) bond length is 1.82 Å. The Fe(1)-O(4) bond length is 1.89 Å. Both Fe(1)-O(8) bond lengths are 2.01 Å. In the second Fe site, Fe(2) is bonded to one O(1), one O(3), and two equivalent O(10) atoms to form FeO4 tetrahedra that share  a cornercorner with one Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, corners with two equivalent Zn(2)O4 trigonal pyramids, and corners with two equivalent Zn(4)O4 trigonal pyramids. The Fe(2)-O(1) bond length is 1.86 Å. The Fe(2)-O(3) bond length is 2.03 Å. Both Fe(2)-O(10) bond lengths are 1.98 Å. In the third Fe site, Fe(3) is bonded to one O(2), one O(9), and two equivalent O(5) atoms to form distorted FeO4 tetrahedra that share  a cornercorner with one Fe(4)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(2)O4 trigonal pyramids, and corners with two equivalent Zn(4)O4 trigonal pyramids. The Fe(3)-O(2) bond length is 2.13 Å. The Fe(3)-O(9) bond length is 1.99 Å. Both Fe(3)-O(5) bond lengths are 2.02 Å. In the fourth Fe site, Fe(4) is bonded to one O(7), one O(9), and two equivalent O(6) atoms to form FeO4 tetrahedra that share  a cornercorner with one Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, and corners with two equivalent Zn(2)O4 trigonal pyramids. The Fe(4)-O(7) bond length is 1.90 Å. The Fe(4)-O(9) bond length is 1.95 Å. Both Fe(4)-O(6) bond lengths are 1.99 Å. There are four inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form ZnO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Zn(1)O4 tetrahedra, and  an edgeedge with one Zn(2)O4 trigonal pyramid. The Zn(1)-O(5) bond length is 2.08 Å. The Zn(1)-O(6) bond length is 2.06 Å. Both Zn(1)-O(4) bond lengths are 1.92 Å. In the second Zn site, Zn(2) is bonded to one O(5), one O(6), and two equivalent O(3) atoms to form ZnO4 trigonal pyramids that share corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Zn(2)O4 trigonal pyramids, and  an edgeedge with one Zn(1)O4 tetrahedra. The Zn(2)-O(5) bond length is 1.92 Å. The Zn(2)-O(6) bond length is 2.12 Å. Both Zn(2)-O(3) bond lengths are 2.05 Å. In the third Zn site, Zn(3) is bonded to one O(10), one O(8), and two equivalent O(7) atoms to form ZnO4 tetrahedra that share corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(4)O4 tetrahedra, corners with two equivalent Zn(3)O4 tetrahedra, and  an edgeedge with one Zn(4)O4 trigonal pyramid. The Zn(3)-O(10) bond length is 2.09 Å. The Zn(3)-O(8) bond length is 2.10 Å. Both Zn(3)-O(7) bond lengths are 1.90 Å. In the fourth Zn site, Zn(4) is bonded to one O(10), one O(8), and two equivalent O(2) atoms to form ZnO4 trigonal pyramids that share corners with two equivalent Fe(1)O4 tetrahedra, corners with two equivalent Fe(2)O4 tetrahedra, corners with two equivalent Fe(3)O4 tetrahedra, corners with two equivalent Zn(4)O4 trigonal pyramids, and  an edgeedge with one Zn(3)O4 tetrahedra. The Zn(4)-O(10) bond length is 2.18 Å. The Zn(4)-O(8) bond length is 1.97 Å. Both Zn(4)-O(2) bond lengths are 1.97 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one Fe(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Fe(3), and two equivalent Zn(4) atoms. In the third O site, O(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Fe(2), and two equivalent Zn(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Fe(1) and two equivalent Zn(1) atoms. In the fifth O site, O(5) is bonded to two equivalent Fe(3), one Zn(1), and one Zn(2) atom to form OZn2Fe2 tetrahedra that share corners with two equivalent O(9)Mg2Fe2 tetrahedra, corners with two equivalent O(5)Zn2Fe2 tetrahedra, and  an edgeedge with one O(6)Zn2Fe2 tetrahedra. In the sixth O site, O(6) is bonded to two equivalent Fe(4), one Zn(1), and one Zn(2) atom to form OZn2Fe2 tetrahedra that share corners with two equivalent O(9)Mg2Fe2 tetrahedra, corners with two equivalent O(6)Zn2Fe2 tetrahedra, and  an edgeedge with one O(5)Zn2Fe2 tetrahedra. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Fe(4) and two equivalent Zn(3) atoms. In the eighth O site, O(8) is bonded to two equivalent Fe(1), one Zn(3), and one Zn(4) atom to form a mixture of edge and corner-sharing OZn2Fe2 tetrahedra. In the ninth O site, O(9) is bonded to two equivalent Mg(1), one Fe(3), and one Fe(4) atom to form distorted OMg2Fe2 tetrahedra that share corners with two equivalent O(9)Mg2Fe2 tetrahedra, corners with two equivalent O(5)Zn2Fe2 tetrahedra, and corners with two equivalent O(6)Zn2Fe2 tetrahedra. In the tenth O site, O(10) is bonded to two equivalent Fe(2), one Zn(3), and one Zn(4) atom to form a mixture of edge and corner-sharing OZn2Fe2 tetrahedra.