MgMn4Zn2O8 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MgO6 octahedra that share corners with six equivalent Zn(2)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, edges with two equivalent Zn(1)O6 octahedra, and edges with two equivalent Zn(2)O6 octahedra. In the third Mn site, Mn(3) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Zn(1)O6 octahedra, and edges with two equivalent Zn(2)O6 octahedra. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ZnO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Zn(2)O6 octahedra. In the second Zn site, Zn(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form ZnO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(1), one Mn(2), one Zn(1), and one Zn(2) atom to form distorted OMgMn2Zn2 trigonal bipyramids that share  a cornercorner with one O(4)MgMn3Zn square pyramid, corners with three equivalent O(2)Mn3Zn tetrahedra,  a cornercorner with one O(3)MgMn2Zn2 trigonal bipyramid, corners with four equivalent O(1)MgMn2Zn2 trigonal bipyramids, edges with three equivalent O(4)MgMn3Zn square pyramids,  an edgeedge with one O(2)Mn3Zn tetrahedra, and edges with three equivalent O(3)MgMn2Zn2 trigonal bipyramids. In the second O site, O(2) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Zn(1) atom to form OMn3Zn tetrahedra that share corners with three equivalent O(4)MgMn3Zn square pyramids, corners with three equivalent O(2)Mn3Zn tetrahedra, corners with three equivalent O(1)MgMn2Zn2 trigonal bipyramids, corners with three equivalent O(3)MgMn2Zn2 trigonal bipyramids,  an edgeedge with one O(4)MgMn3Zn square pyramid,  an edgeedge with one O(1)MgMn2Zn2 trigonal bipyramid, and  an edgeedge with one O(3)MgMn2Zn2 trigonal bipyramid. In the third O site, O(3) is bonded to one Mg(1), one Mn(1), one Mn(3), one Zn(1), and one Zn(2) atom to form OMgMn2Zn2 trigonal bipyramids that share  a cornercorner with one O(4)MgMn3Zn square pyramid, corners with three equivalent O(2)Mn3Zn tetrahedra,  a cornercorner with one O(1)MgMn2Zn2 trigonal bipyramid, corners with four equivalent O(3)MgMn2Zn2 trigonal bipyramids, edges with three equivalent O(4)MgMn3Zn square pyramids,  an edgeedge with one O(2)Mn3Zn tetrahedra, and edges with three equivalent O(1)MgMn2Zn2 trigonal bipyramids. In the fourth O site, O(4) is bonded to one Mg(1), one Mn(1), one Mn(2), one Mn(3), and one Zn(2) atom to form OMgMn3Zn square pyramids that share corners with four equivalent O(4)MgMn3Zn square pyramids, corners with three equivalent O(2)Mn3Zn tetrahedra,  a cornercorner with one O(1)MgMn2Zn2 trigonal bipyramid,  a cornercorner with one O(3)MgMn2Zn2 trigonal bipyramid,  an edgeedge with one O(2)Mn3Zn tetrahedra, edges with three equivalent O(1)MgMn2Zn2 trigonal bipyramids, and edges with three equivalent O(3)MgMn2Zn2 trigonal bipyramids.
MgMn4Zn2O8 crystallizes in the triclinic P-1 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MgO6 octahedra that share corners with six equivalent Zn(2)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. Both Mg(1)-O(1) bond lengths are 2.15 Å. Both Mg(1)-O(3) bond lengths are 2.15 Å. Both Mg(1)-O(4) bond lengths are 2.11 Å. There are three inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Mn(1)-O(1) bond length is 2.12 Å. The Mn(1)-O(2) bond length is 1.98 Å. The Mn(1)-O(3) bond length is 2.16 Å. The Mn(1)-O(4) bond length is 2.16 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, edges with two equivalent Zn(1)O6 octahedra, and edges with two equivalent Zn(2)O6 octahedra. Both Mn(2)-O(1) bond lengths are 1.97 Å. Both Mn(2)-O(2) bond lengths are 1.93 Å. Both Mn(2)-O(4) bond lengths are 2.35 Å. In the third Mn site, Mn(3) is bonded to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Zn(1)O6 octahedra, and edges with two equivalent Zn(2)O6 octahedra. Both Mn(3)-O(2) bond lengths are 1.94 Å. Both Mn(3)-O(3) bond lengths are 2.04 Å. Both Mn(3)-O(4) bond lengths are 2.09 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ZnO6 octahedra that share edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Zn(2)O6 octahedra. Both Zn(1)-O(1) bond lengths are 2.14 Å. Both Zn(1)-O(2) bond lengths are 2.01 Å. Both Zn(1)-O(3) bond lengths are 2.28 Å. In the second Zn site, Zn(2) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form ZnO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(2)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and edges with two equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 4-8°. Both Zn(2)-O(1) bond lengths are 2.46 Å. Both Zn(2)-O(3) bond lengths are 2.16 Å. Both Zn(2)-O(4) bond lengths are 2.17 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(1), one Mn(2), one Zn(1), and one Zn(2) atom to form distorted OMgMn2Zn2 trigonal bipyramids that share  a cornercorner with one O(4)MgMn3Zn square pyramid, corners with three equivalent O(2)Mn3Zn tetrahedra,  a cornercorner with one O(3)MgMn2Zn2 trigonal bipyramid, corners with four equivalent O(1)MgMn2Zn2 trigonal bipyramids, edges with three equivalent O(4)MgMn3Zn square pyramids,  an edgeedge with one O(2)Mn3Zn tetrahedra, and edges with three equivalent O(3)MgMn2Zn2 trigonal bipyramids. In the second O site, O(2) is bonded to one Mn(1), one Mn(2), one Mn(3), and one Zn(1) atom to form OMn3Zn tetrahedra that share corners with three equivalent O(4)MgMn3Zn square pyramids, corners with three equivalent O(2)Mn3Zn tetrahedra, corners with three equivalent O(1)MgMn2Zn2 trigonal bipyramids, corners with three equivalent O(3)MgMn2Zn2 trigonal bipyramids,  an edgeedge with one O(4)MgMn3Zn square pyramid,  an edgeedge with one O(1)MgMn2Zn2 trigonal bipyramid, and  an edgeedge with one O(3)MgMn2Zn2 trigonal bipyramid. In the third O site, O(3) is bonded to one Mg(1), one Mn(1), one Mn(3), one Zn(1), and one Zn(2) atom to form OMgMn2Zn2 trigonal bipyramids that share  a cornercorner with one O(4)MgMn3Zn square pyramid, corners with three equivalent O(2)Mn3Zn tetrahedra,  a cornercorner with one O(1)MgMn2Zn2 trigonal bipyramid, corners with four equivalent O(3)MgMn2Zn2 trigonal bipyramids, edges with three equivalent O(4)MgMn3Zn square pyramids,  an edgeedge with one O(2)Mn3Zn tetrahedra, and edges with three equivalent O(1)MgMn2Zn2 trigonal bipyramids. In the fourth O site, O(4) is bonded to one Mg(1), one Mn(1), one Mn(2), one Mn(3), and one Zn(2) atom to form OMgMn3Zn square pyramids that share corners with four equivalent O(4)MgMn3Zn square pyramids, corners with three equivalent O(2)Mn3Zn tetrahedra,  a cornercorner with one O(1)MgMn2Zn2 trigonal bipyramid,  a cornercorner with one O(3)MgMn2Zn2 trigonal bipyramid,  an edgeedge with one O(2)Mn3Zn tetrahedra, edges with three equivalent O(1)MgMn2Zn2 trigonal bipyramids, and edges with three equivalent O(3)MgMn2Zn2 trigonal bipyramids.