MgZn2(FeO2)4 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(5), and one O(8) atom to form MgO4 tetrahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(1)O4 tetrahedra, and  an edgeedge with one Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-67°. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form FeO4 tetrahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(3)O6 octahedra, and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 55-69°. In the second Fe site, Fe(2) 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 FeO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and edges with two equivalent Fe(3)O6 octahedra. In the third Fe site, Fe(3) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form FeO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and edges with two equivalent Fe(2)O6 octahedra. In the fourth Fe site, Fe(4) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(6), and one O(7) atom. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form distorted ZnO4 tetrahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(3)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-68°. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Fe(3), and one Zn(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one Fe(1), one Fe(2), one Fe(4), and one Zn(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), one Fe(1), one Fe(3), one Fe(4), and one Zn(2) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Fe(3), and one Fe(4) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Mg(1), one Fe(2), one Fe(3), and one Zn(1) atom. In the sixth O site, O(6) is bonded to one Fe(3), one Fe(4), one Zn(1), and one Zn(2) atom to form OZn2Fe2 tetrahedra that share  a cornercorner with one O(7)Zn2Fe2 tetrahedra, corners with two equivalent O(8)MgZnFe2 tetrahedra, and  an edgeedge with one O(7)Zn2Fe2 tetrahedra. In the seventh O site, O(7) is bonded to one Fe(2), one Fe(4), one Zn(1), and one Zn(2) atom to form OZn2Fe2 tetrahedra that share  a cornercorner with one O(6)Zn2Fe2 tetrahedra, corners with two equivalent O(8)MgZnFe2 tetrahedra, and  an edgeedge with one O(6)Zn2Fe2 tetrahedra. In the eighth O site, O(8) is bonded to one Mg(1), one Fe(2), one Fe(3), and one Zn(1) atom to form distorted corner-sharing OMgZnFe2 tetrahedra.
MgZn2(FeO2)4 is Aluminum carbonitride-derived structured and crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(2), one O(3), one O(5), and one O(8) atom to form MgO4 tetrahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(3)O6 octahedra, corners with two equivalent Fe(1)O4 tetrahedra, and  an edgeedge with one Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 36-67°. The Mg(1)-O(2) bond length is 2.01 Å. The Mg(1)-O(3) bond length is 2.03 Å. The Mg(1)-O(5) bond length is 1.95 Å. The Mg(1)-O(8) bond length is 1.93 Å. There are four inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form FeO4 tetrahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(3)O6 octahedra, and corners with two equivalent Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 55-69°. The Fe(1)-O(1) bond length is 1.98 Å. The Fe(1)-O(2) bond length is 1.95 Å. The Fe(1)-O(3) bond length is 1.95 Å. The Fe(1)-O(4) bond length is 1.96 Å. In the second Fe site, Fe(2) 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 FeO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and edges with two equivalent Fe(3)O6 octahedra. The Fe(2)-O(1) bond length is 2.25 Å. The Fe(2)-O(2) bond length is 2.35 Å. The Fe(2)-O(4) bond length is 2.24 Å. The Fe(2)-O(5) bond length is 2.13 Å. The Fe(2)-O(7) bond length is 2.06 Å. The Fe(2)-O(8) bond length is 2.14 Å. In the third Fe site, Fe(3) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), and one O(8) atom to form FeO6 octahedra that share corners with three equivalent Mg(1)O4 tetrahedra, corners with three equivalent Fe(1)O4 tetrahedra, corners with three equivalent Zn(1)O4 tetrahedra, and edges with two equivalent Fe(2)O6 octahedra. The Fe(3)-O(1) bond length is 2.17 Å. The Fe(3)-O(3) bond length is 2.43 Å. The Fe(3)-O(4) bond length is 2.13 Å. The Fe(3)-O(5) bond length is 2.02 Å. The Fe(3)-O(6) bond length is 2.00 Å. The Fe(3)-O(8) bond length is 2.00 Å. In the fourth Fe site, Fe(4) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(6), and one O(7) atom. The Fe(4)-O(2) bond length is 2.18 Å. The Fe(4)-O(3) bond length is 2.28 Å. The Fe(4)-O(4) bond length is 2.05 Å. The Fe(4)-O(6) bond length is 2.06 Å. The Fe(4)-O(7) bond length is 2.00 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form distorted ZnO4 tetrahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Fe(3)O6 octahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 49-68°. The Zn(1)-O(5) bond length is 2.12 Å. The Zn(1)-O(6) bond length is 1.93 Å. The Zn(1)-O(7) bond length is 1.91 Å. The Zn(1)-O(8) bond length is 2.14 Å. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(6), and one O(7) atom. The Zn(2)-O(1) bond length is 1.97 Å. The Zn(2)-O(2) bond length is 2.29 Å. The Zn(2)-O(3) bond length is 2.19 Å. The Zn(2)-O(6) bond length is 2.06 Å. The Zn(2)-O(7) bond length is 2.01 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Fe(3), and one Zn(2) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one Fe(1), one Fe(2), one Fe(4), and one Zn(2) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), one Fe(1), one Fe(3), one Fe(4), and one Zn(2) atom. In the fourth O site, O(4) is bonded in a rectangular see-saw-like geometry to one Fe(1), one Fe(2), one Fe(3), and one Fe(4) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Mg(1), one Fe(2), one Fe(3), and one Zn(1) atom. In the sixth O site, O(6) is bonded to one Fe(3), one Fe(4), one Zn(1), and one Zn(2) atom to form OZn2Fe2 tetrahedra that share  a cornercorner with one O(7)Zn2Fe2 tetrahedra, corners with two equivalent O(8)MgZnFe2 tetrahedra, and  an edgeedge with one O(7)Zn2Fe2 tetrahedra. In the seventh O site, O(7) is bonded to one Fe(2), one Fe(4), one Zn(1), and one Zn(2) atom to form OZn2Fe2 tetrahedra that share  a cornercorner with one O(6)Zn2Fe2 tetrahedra, corners with two equivalent O(8)MgZnFe2 tetrahedra, and  an edgeedge with one O(6)Zn2Fe2 tetrahedra. In the eighth O site, O(8) is bonded to one Mg(1), one Fe(2), one Fe(3), and one Zn(1) atom to form distorted corner-sharing OMgZnFe2 tetrahedra.