MgZn2(FeO3)2 crystallizes in the trigonal R3 space group. Mg(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form distorted FeO6 octahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with six equivalent Zn(1)O6 octahedra, edges with three equivalent Zn(2)O6 octahedra, and  a faceface with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-55°. In the second Fe site, Fe(2) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form FeO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, edges with three equivalent Zn(1)O6 octahedra,  a faceface with one Fe(1)O6 octahedra, and  a faceface with one Zn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-53°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form ZnO6 octahedra that share corners with three equivalent Zn(2)O6 octahedra, corners with six equivalent Fe(1)O6 octahedra, edges with three equivalent Fe(2)O6 octahedra, and  a faceface with one Zn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-55°. In the second Zn site, Zn(2) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form ZnO6 octahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Zn(1)O6 octahedra, edges with three equivalent Fe(1)O6 octahedra,  a faceface with one Fe(2)O6 octahedra, and  a faceface with one Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-45°. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Fe(1), one Fe(2), one Zn(1), and one Zn(2) atom to form a mixture of distorted corner and edge-sharing OMgZn2Fe2 trigonal bipyramids. In the second O site, O(2) is bonded to one Mg(1), one Fe(1), one Fe(2), one Zn(1), and one Zn(2) atom to form a mixture of distorted corner and edge-sharing OMgZn2Fe2 trigonal bipyramids.
MgZn2(FeO3)2 crystallizes in the trigonal R3 space group. Mg(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. All Mg(1)-O(1) bond lengths are 2.40 Å. All Mg(1)-O(2) bond lengths are 2.02 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form distorted FeO6 octahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with six equivalent Zn(1)O6 octahedra, edges with three equivalent Zn(2)O6 octahedra, and  a faceface with one Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-55°. All Fe(1)-O(1) bond lengths are 1.99 Å. All Fe(1)-O(2) bond lengths are 2.23 Å. In the second Fe site, Fe(2) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form FeO6 octahedra that share corners with three equivalent Fe(1)O6 octahedra, corners with three equivalent Zn(2)O6 octahedra, edges with three equivalent Zn(1)O6 octahedra,  a faceface with one Fe(1)O6 octahedra, and  a faceface with one Zn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-53°. All Fe(2)-O(1) bond lengths are 2.16 Å. All Fe(2)-O(2) bond lengths are 2.01 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form ZnO6 octahedra that share corners with three equivalent Zn(2)O6 octahedra, corners with six equivalent Fe(1)O6 octahedra, edges with three equivalent Fe(2)O6 octahedra, and  a faceface with one Zn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-55°. All Zn(1)-O(1) bond lengths are 2.07 Å. All Zn(1)-O(2) bond lengths are 2.29 Å. In the second Zn site, Zn(2) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form ZnO6 octahedra that share corners with three equivalent Fe(2)O6 octahedra, corners with three equivalent Zn(1)O6 octahedra, edges with three equivalent Fe(1)O6 octahedra,  a faceface with one Fe(2)O6 octahedra, and  a faceface with one Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-45°. All Zn(2)-O(1) bond lengths are 2.14 Å. All Zn(2)-O(2) bond lengths are 2.08 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Fe(1), one Fe(2), one Zn(1), and one Zn(2) atom to form a mixture of distorted corner and edge-sharing OMgZn2Fe2 trigonal bipyramids. In the second O site, O(2) is bonded to one Mg(1), one Fe(1), one Fe(2), one Zn(1), and one Zn(2) atom to form a mixture of distorted corner and edge-sharing OMgZn2Fe2 trigonal bipyramids.