MgMn4Zn2O8 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form distorted MgO6 octahedra that share  a cornercorner with one Zn(2)O4 trigonal pyramid, corners with two equivalent Zn(1)O4 trigonal pyramids, corners with three equivalent Mn(1)O4 trigonal pyramids, edges with two equivalent Mn(3)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and  an edgeedge with one Zn(2)O4 trigonal pyramid. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted MnO4 trigonal pyramids that share corners with three equivalent Mg(1)O6 octahedra, corners with three equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra,  a cornercorner with one Zn(1)O4 trigonal pyramid, and  a cornercorner with one Zn(2)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 39-69°. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom. In the third Mn site, Mn(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 MnO6 octahedra that share  a cornercorner with one Zn(2)O4 trigonal pyramid, corners with three equivalent Mn(1)O4 trigonal pyramids, corners with four equivalent Zn(1)O4 trigonal pyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and  an edgeedge with one Zn(2)O4 trigonal pyramid. In the fourth Mn site, Mn(4) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form MnO6 octahedra that share  a cornercorner with one Zn(1)O4 trigonal pyramid, corners with three equivalent Mn(1)O4 trigonal pyramids, corners with four equivalent Zn(2)O4 trigonal pyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and  an edgeedge with one Zn(1)O4 trigonal pyramid. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form distorted ZnO4 trigonal pyramids that share  a cornercorner with one Mn(4)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Mn(3)O6 octahedra,  a cornercorner with one Mn(1)O4 trigonal pyramid,  an edgeedge with one Mn(4)O6 octahedra, and  an edgeedge with one Zn(2)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 18-81°. In the second Zn site, Zn(2) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form distorted ZnO4 trigonal pyramids that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mn(3)O6 octahedra, corners with four equivalent Mn(4)O6 octahedra,  a cornercorner with one Mn(1)O4 trigonal pyramid,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mn(3)O6 octahedra, and  an edgeedge with one Zn(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 16-83°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Mn(3) atom to form distorted OMgMn3 tetrahedra that share  a cornercorner with one O(2)MgMn3 tetrahedra, corners with two equivalent O(6)MgMn2Zn2 trigonal bipyramids, corners with two equivalent O(5)Mn3Zn2 trigonal bipyramids, corners with two equivalent O(7)MgMn2Zn trigonal pyramids, corners with three equivalent O(8)MgMn2Zn trigonal pyramids, and  an edgeedge with one O(2)MgMn3 tetrahedra. In the second O site, O(2) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Mn(4) atom to form OMgMn3 tetrahedra that share  a cornercorner with one O(1)MgMn3 tetrahedra, corners with two equivalent O(6)MgMn2Zn2 trigonal bipyramids, corners with two equivalent O(5)Mn3Zn2 trigonal bipyramids, corners with two equivalent O(8)MgMn2Zn trigonal pyramids, corners with three equivalent O(7)MgMn2Zn trigonal pyramids, and  an edgeedge with one O(1)MgMn3 tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), one Mn(1), one Mn(3), one Mn(4), and one Zn(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Mn(1), one Mn(2), one Mn(3), one Mn(4), and one Zn(1) atom. In the fifth O site, O(5) is bonded to one Mn(2), one Mn(3), one Mn(4), one Zn(1), and one Zn(2) atom to form OMn3Zn2 trigonal bipyramids that share corners with two equivalent O(1)MgMn3 tetrahedra, corners with two equivalent O(2)MgMn3 tetrahedra,  a cornercorner with one O(7)MgMn2Zn trigonal pyramid,  a cornercorner with one O(8)MgMn2Zn trigonal pyramid, edges with two equivalent O(6)MgMn2Zn2 trigonal bipyramids,  an edgeedge with one O(7)MgMn2Zn trigonal pyramid, and  an edgeedge with one O(8)MgMn2Zn trigonal pyramid. In the sixth O site, O(6) is bonded to one Mg(1), one Mn(3), one Mn(4), one Zn(1), and one Zn(2) atom to form distorted OMgMn2Zn2 trigonal bipyramids that share corners with two equivalent O(1)MgMn3 tetrahedra, corners with two equivalent O(2)MgMn3 tetrahedra,  a cornercorner with one O(7)MgMn2Zn trigonal pyramid,  a cornercorner with one O(8)MgMn2Zn trigonal pyramid, edges with two equivalent O(5)Mn3Zn2 trigonal bipyramids,  an edgeedge with one O(7)MgMn2Zn trigonal pyramid, and  an edgeedge with one O(8)MgMn2Zn trigonal pyramid. In the seventh O site, O(7) is bonded to one Mg(1), one Mn(2), one Mn(4), and one Zn(2) atom to form OMgMn2Zn trigonal pyramids that share corners with two equivalent O(1)MgMn3 tetrahedra, corners with three equivalent O(2)MgMn3 tetrahedra,  a cornercorner with one O(6)MgMn2Zn2 trigonal bipyramid,  a cornercorner with one O(5)Mn3Zn2 trigonal bipyramid,  an edgeedge with one O(6)MgMn2Zn2 trigonal bipyramid,  an edgeedge with one O(5)Mn3Zn2 trigonal bipyramid, and  an edgeedge with one O(8)MgMn2Zn trigonal pyramid. In the eighth O site, O(8) is bonded to one Mg(1), one Mn(2), one Mn(3), and one Zn(1) atom to form OMgMn2Zn trigonal pyramids that share corners with two equivalent O(2)MgMn3 tetrahedra, corners with three equivalent O(1)MgMn3 tetrahedra,  a cornercorner with one O(6)MgMn2Zn2 trigonal bipyramid,  a cornercorner with one O(5)Mn3Zn2 trigonal bipyramid,  an edgeedge with one O(6)MgMn2Zn2 trigonal bipyramid,  an edgeedge with one O(5)Mn3Zn2 trigonal bipyramid, and  an edgeedge with one O(7)MgMn2Zn trigonal pyramid.
MgMn4Zn2O8 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(6), one O(7), and one O(8) atom to form distorted MgO6 octahedra that share  a cornercorner with one Zn(2)O4 trigonal pyramid, corners with two equivalent Zn(1)O4 trigonal pyramids, corners with three equivalent Mn(1)O4 trigonal pyramids, edges with two equivalent Mn(3)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and  an edgeedge with one Zn(2)O4 trigonal pyramid. The Mg(1)-O(1) bond length is 2.11 Å. The Mg(1)-O(2) bond length is 2.08 Å. The Mg(1)-O(3) bond length is 2.59 Å. The Mg(1)-O(6) bond length is 2.06 Å. The Mg(1)-O(7) bond length is 2.07 Å. The Mg(1)-O(8) bond length is 2.07 Å. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form distorted MnO4 trigonal pyramids that share corners with three equivalent Mg(1)O6 octahedra, corners with three equivalent Mn(3)O6 octahedra, corners with three equivalent Mn(4)O6 octahedra,  a cornercorner with one Zn(1)O4 trigonal pyramid, and  a cornercorner with one Zn(2)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 39-69°. The Mn(1)-O(1) bond length is 1.96 Å. The Mn(1)-O(2) bond length is 1.98 Å. The Mn(1)-O(3) bond length is 1.95 Å. The Mn(1)-O(4) bond length is 1.91 Å. In the second Mn site, Mn(2) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(4), one O(5), one O(7), and one O(8) atom. The Mn(2)-O(1) bond length is 1.99 Å. The Mn(2)-O(2) bond length is 2.03 Å. The Mn(2)-O(4) bond length is 2.71 Å. The Mn(2)-O(5) bond length is 2.19 Å. The Mn(2)-O(7) bond length is 1.95 Å. The Mn(2)-O(8) bond length is 1.93 Å. In the third Mn site, Mn(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 MnO6 octahedra that share  a cornercorner with one Zn(2)O4 trigonal pyramid, corners with three equivalent Mn(1)O4 trigonal pyramids, corners with four equivalent Zn(1)O4 trigonal pyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, and  an edgeedge with one Zn(2)O4 trigonal pyramid. The Mn(3)-O(1) bond length is 2.21 Å. The Mn(3)-O(3) bond length is 2.24 Å. The Mn(3)-O(4) bond length is 2.29 Å. The Mn(3)-O(5) bond length is 2.29 Å. The Mn(3)-O(6) bond length is 2.18 Å. The Mn(3)-O(8) bond length is 2.15 Å. In the fourth Mn site, Mn(4) is bonded to one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom to form MnO6 octahedra that share  a cornercorner with one Zn(1)O4 trigonal pyramid, corners with three equivalent Mn(1)O4 trigonal pyramids, corners with four equivalent Zn(2)O4 trigonal pyramids, edges with two equivalent Mg(1)O6 octahedra, edges with two equivalent Mn(3)O6 octahedra, and  an edgeedge with one Zn(1)O4 trigonal pyramid. The Mn(4)-O(2) bond length is 2.20 Å. The Mn(4)-O(3) bond length is 2.29 Å. The Mn(4)-O(4) bond length is 2.26 Å. The Mn(4)-O(5) bond length is 2.17 Å. The Mn(4)-O(6) bond length is 2.27 Å. The Mn(4)-O(7) bond length is 2.15 Å. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(4), one O(5), one O(6), and one O(8) atom to form distorted ZnO4 trigonal pyramids that share  a cornercorner with one Mn(4)O6 octahedra, corners with two equivalent Mg(1)O6 octahedra, corners with four equivalent Mn(3)O6 octahedra,  a cornercorner with one Mn(1)O4 trigonal pyramid,  an edgeedge with one Mn(4)O6 octahedra, and  an edgeedge with one Zn(2)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 18-81°. The Zn(1)-O(4) bond length is 2.11 Å. The Zn(1)-O(5) bond length is 2.02 Å. The Zn(1)-O(6) bond length is 2.06 Å. The Zn(1)-O(8) bond length is 1.94 Å. In the second Zn site, Zn(2) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form distorted ZnO4 trigonal pyramids that share  a cornercorner with one Mg(1)O6 octahedra,  a cornercorner with one Mn(3)O6 octahedra, corners with four equivalent Mn(4)O6 octahedra,  a cornercorner with one Mn(1)O4 trigonal pyramid,  an edgeedge with one Mg(1)O6 octahedra,  an edgeedge with one Mn(3)O6 octahedra, and  an edgeedge with one Zn(1)O4 trigonal pyramid. The corner-sharing octahedral tilt angles range from 16-83°. The Zn(2)-O(3) bond length is 2.09 Å. The Zn(2)-O(5) bond length is 2.06 Å. The Zn(2)-O(6) bond length is 2.03 Å. The Zn(2)-O(7) bond length is 1.94 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Mn(3) atom to form distorted OMgMn3 tetrahedra that share  a cornercorner with one O(2)MgMn3 tetrahedra, corners with two equivalent O(6)MgMn2Zn2 trigonal bipyramids, corners with two equivalent O(5)Mn3Zn2 trigonal bipyramids, corners with two equivalent O(7)MgMn2Zn trigonal pyramids, corners with three equivalent O(8)MgMn2Zn trigonal pyramids, and  an edgeedge with one O(2)MgMn3 tetrahedra. In the second O site, O(2) is bonded to one Mg(1), one Mn(1), one Mn(2), and one Mn(4) atom to form OMgMn3 tetrahedra that share  a cornercorner with one O(1)MgMn3 tetrahedra, corners with two equivalent O(6)MgMn2Zn2 trigonal bipyramids, corners with two equivalent O(5)Mn3Zn2 trigonal bipyramids, corners with two equivalent O(8)MgMn2Zn trigonal pyramids, corners with three equivalent O(7)MgMn2Zn trigonal pyramids, and  an edgeedge with one O(1)MgMn3 tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Mg(1), one Mn(1), one Mn(3), one Mn(4), and one Zn(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Mn(1), one Mn(2), one Mn(3), one Mn(4), and one Zn(1) atom. In the fifth O site, O(5) is bonded to one Mn(2), one Mn(3), one Mn(4), one Zn(1), and one Zn(2) atom to form OMn3Zn2 trigonal bipyramids that share corners with two equivalent O(1)MgMn3 tetrahedra, corners with two equivalent O(2)MgMn3 tetrahedra,  a cornercorner with one O(7)MgMn2Zn trigonal pyramid,  a cornercorner with one O(8)MgMn2Zn trigonal pyramid, edges with two equivalent O(6)MgMn2Zn2 trigonal bipyramids,  an edgeedge with one O(7)MgMn2Zn trigonal pyramid, and  an edgeedge with one O(8)MgMn2Zn trigonal pyramid. In the sixth O site, O(6) is bonded to one Mg(1), one Mn(3), one Mn(4), one Zn(1), and one Zn(2) atom to form distorted OMgMn2Zn2 trigonal bipyramids that share corners with two equivalent O(1)MgMn3 tetrahedra, corners with two equivalent O(2)MgMn3 tetrahedra,  a cornercorner with one O(7)MgMn2Zn trigonal pyramid,  a cornercorner with one O(8)MgMn2Zn trigonal pyramid, edges with two equivalent O(5)Mn3Zn2 trigonal bipyramids,  an edgeedge with one O(7)MgMn2Zn trigonal pyramid, and  an edgeedge with one O(8)MgMn2Zn trigonal pyramid. In the seventh O site, O(7) is bonded to one Mg(1), one Mn(2), one Mn(4), and one Zn(2) atom to form OMgMn2Zn trigonal pyramids that share corners with two equivalent O(1)MgMn3 tetrahedra, corners with three equivalent O(2)MgMn3 tetrahedra,  a cornercorner with one O(6)MgMn2Zn2 trigonal bipyramid,  a cornercorner with one O(5)Mn3Zn2 trigonal bipyramid,  an edgeedge with one O(6)MgMn2Zn2 trigonal bipyramid,  an edgeedge with one O(5)Mn3Zn2 trigonal bipyramid, and  an edgeedge with one O(8)MgMn2Zn trigonal pyramid. In the eighth O site, O(8) is bonded to one Mg(1), one Mn(2), one Mn(3), and one Zn(1) atom to form OMgMn2Zn trigonal pyramids that share corners with two equivalent O(2)MgMn3 tetrahedra, corners with three equivalent O(1)MgMn3 tetrahedra,  a cornercorner with one O(6)MgMn2Zn2 trigonal bipyramid,  a cornercorner with one O(5)Mn3Zn2 trigonal bipyramid,  an edgeedge with one O(6)MgMn2Zn2 trigonal bipyramid,  an edgeedge with one O(5)Mn3Zn2 trigonal bipyramid, and  an edgeedge with one O(7)MgMn2Zn trigonal pyramid.