MgMn4ZnO8 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), two equivalent O(5), and two equivalent O(8) atoms to form MgO5 square pyramids that share corners with two equivalent Mn(1)O6 octahedra,  a cornercorner with one Mn(3)O5 trigonal bipyramid, corners with two equivalent Mn(2)O5 trigonal bipyramids,  an edgeedge with one Mn(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, edges with two equivalent Mg(1)O5 square pyramids, and  an edgeedge with one Mn(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 10-18°. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mg(1)O5 square pyramids, corners with two equivalent Mn(2)O5 trigonal bipyramids, corners with two equivalent Mn(3)O5 trigonal bipyramids, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra,  an edgeedge with one Mg(1)O5 square pyramid, and edges with two equivalent Zn(1)O5 square pyramids. In the second Mn site, Mn(2) is bonded to one O(4), one O(6), one O(8), and two equivalent O(3) atoms to form distorted MnO5 trigonal bipyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Zn(1)O5 square pyramid, corners with two equivalent Mg(1)O5 square pyramids, corners with two equivalent Mn(2)O5 trigonal bipyramids,  an edgeedge with one Zn(1)O5 square pyramid, and  an edgeedge with one Mn(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 41-60°. In the third Mn site, Mn(3) is bonded to one O(1), one O(6), one O(8), and two equivalent O(2) atoms to form distorted MnO5 trigonal bipyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Mg(1)O5 square pyramid, corners with two equivalent Zn(1)O5 square pyramids, corners with two equivalent Mn(3)O5 trigonal bipyramids,  an edgeedge with one Mg(1)O5 square pyramid, and  an edgeedge with one Mn(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 40-61°. In the fourth Mn site, Mn(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form distorted MnO6 octahedra that share corners with two equivalent Zn(1)O5 square pyramids, corners with two equivalent Mn(2)O5 trigonal bipyramids, corners with two equivalent Mn(3)O5 trigonal bipyramids, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra,  an edgeedge with one Zn(1)O5 square pyramid, and edges with two equivalent Mg(1)O5 square pyramids. Zn(1) is bonded to one O(4), two equivalent O(6), and two equivalent O(7) atoms to form ZnO5 square pyramids that share corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Mn(2)O5 trigonal bipyramid, corners with two equivalent Mn(3)O5 trigonal bipyramids,  an edgeedge with one Mn(4)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Zn(1)O5 square pyramids, and  an edgeedge with one Mn(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 11-18°. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(3), and two equivalent Mn(4) atoms to form OMgMn3 trigonal pyramids that share corners with two equivalent O(7)Mn3Zn2 square pyramids,  a cornercorner with one O(8)Mg2Mn2 trigonal pyramid,  a cornercorner with one O(6)Mn2Zn2 trigonal pyramid, corners with two equivalent O(1)MgMn3 trigonal pyramids,  an edgeedge with one O(7)Mn3Zn2 square pyramid, edges with two equivalent O(5)Mg2Mn3 square pyramids, and  an edgeedge with one O(8)Mg2Mn2 trigonal pyramid. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mn(1) and two equivalent Mn(3) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(4) and two equivalent Mn(2) atoms. In the fourth O site, O(4) is bonded to one Mn(2), two equivalent Mn(1), and one Zn(1) atom to form OMn3Zn trigonal pyramids that share corners with two equivalent O(5)Mg2Mn3 square pyramids,  a cornercorner with one O(8)Mg2Mn2 trigonal pyramid,  a cornercorner with one O(6)Mn2Zn2 trigonal pyramid, corners with two equivalent O(4)Mn3Zn trigonal pyramids,  an edgeedge with one O(5)Mg2Mn3 square pyramid, edges with two equivalent O(7)Mn3Zn2 square pyramids, and  an edgeedge with one O(6)Mn2Zn2 trigonal pyramid. In the fifth O site, O(5) is bonded to two equivalent Mg(1), one Mn(4), and two equivalent Mn(1) atoms to form distorted OMg2Mn3 square pyramids that share corners with two equivalent O(8)Mg2Mn2 trigonal pyramids, corners with two equivalent O(4)Mn3Zn trigonal pyramids, edges with two equivalent O(5)Mg2Mn3 square pyramids, edges with two equivalent O(7)Mn3Zn2 square pyramids,  an edgeedge with one O(8)Mg2Mn2 trigonal pyramid,  an edgeedge with one O(4)Mn3Zn trigonal pyramid, and edges with two equivalent O(1)MgMn3 trigonal pyramids. In the sixth O site, O(6) is bonded to one Mn(2), one Mn(3), and two equivalent Zn(1) atoms to form distorted OMn2Zn2 trigonal pyramids that share corners with two equivalent O(7)Mn3Zn2 square pyramids,  a cornercorner with one O(1)MgMn3 trigonal pyramid,  a cornercorner with one O(4)Mn3Zn trigonal pyramid, corners with two equivalent O(6)Mn2Zn2 trigonal pyramids,  an edgeedge with one O(7)Mn3Zn2 square pyramid,  an edgeedge with one O(8)Mg2Mn2 trigonal pyramid, and  an edgeedge with one O(4)Mn3Zn trigonal pyramid. In the seventh O site, O(7) is bonded to one Mn(1), two equivalent Mn(4), and two equivalent Zn(1) atoms to form distorted OMn3Zn2 square pyramids that share corners with two equivalent O(1)MgMn3 trigonal pyramids, corners with two equivalent O(6)Mn2Zn2 trigonal pyramids, edges with two equivalent O(5)Mg2Mn3 square pyramids, edges with two equivalent O(7)Mn3Zn2 square pyramids,  an edgeedge with one O(1)MgMn3 trigonal pyramid,  an edgeedge with one O(6)Mn2Zn2 trigonal pyramid, and edges with two equivalent O(4)Mn3Zn trigonal pyramids. In the eighth O site, O(8) is bonded to two equivalent Mg(1), one Mn(2), and one Mn(3) atom to form distorted OMg2Mn2 trigonal pyramids that share corners with two equivalent O(5)Mg2Mn3 square pyramids,  a cornercorner with one O(1)MgMn3 trigonal pyramid,  a cornercorner with one O(4)Mn3Zn trigonal pyramid, corners with two equivalent O(8)Mg2Mn2 trigonal pyramids,  an edgeedge with one O(5)Mg2Mn3 square pyramid,  an edgeedge with one O(1)MgMn3 trigonal pyramid, and  an edgeedge with one O(6)Mn2Zn2 trigonal pyramid.
MgMn4ZnO8 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), two equivalent O(5), and two equivalent O(8) atoms to form MgO5 square pyramids that share corners with two equivalent Mn(1)O6 octahedra,  a cornercorner with one Mn(3)O5 trigonal bipyramid, corners with two equivalent Mn(2)O5 trigonal bipyramids,  an edgeedge with one Mn(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra, edges with two equivalent Mg(1)O5 square pyramids, and  an edgeedge with one Mn(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 10-18°. The Mg(1)-O(1) bond length is 2.08 Å. There is one shorter (2.08 Å) and one longer (2.13 Å) Mg(1)-O(5) bond length. There is one shorter (2.06 Å) and one longer (2.09 Å) Mg(1)-O(8) bond length. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(7), two equivalent O(4), and two equivalent O(5) atoms to form distorted MnO6 octahedra that share corners with two equivalent Mg(1)O5 square pyramids, corners with two equivalent Mn(2)O5 trigonal bipyramids, corners with two equivalent Mn(3)O5 trigonal bipyramids, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra,  an edgeedge with one Mg(1)O5 square pyramid, and edges with two equivalent Zn(1)O5 square pyramids. The Mn(1)-O(2) bond length is 1.91 Å. The Mn(1)-O(7) bond length is 2.07 Å. There is one shorter (1.93 Å) and one longer (2.18 Å) Mn(1)-O(4) bond length. There is one shorter (2.00 Å) and one longer (2.60 Å) Mn(1)-O(5) bond length. In the second Mn site, Mn(2) is bonded to one O(4), one O(6), one O(8), and two equivalent O(3) atoms to form distorted MnO5 trigonal bipyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Zn(1)O5 square pyramid, corners with two equivalent Mg(1)O5 square pyramids, corners with two equivalent Mn(2)O5 trigonal bipyramids,  an edgeedge with one Zn(1)O5 square pyramid, and  an edgeedge with one Mn(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 41-60°. The Mn(2)-O(4) bond length is 1.99 Å. The Mn(2)-O(6) bond length is 2.06 Å. The Mn(2)-O(8) bond length is 1.97 Å. There is one shorter (1.91 Å) and one longer (2.11 Å) Mn(2)-O(3) bond length. In the third Mn site, Mn(3) is bonded to one O(1), one O(6), one O(8), and two equivalent O(2) atoms to form distorted MnO5 trigonal bipyramids that share corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Mg(1)O5 square pyramid, corners with two equivalent Zn(1)O5 square pyramids, corners with two equivalent Mn(3)O5 trigonal bipyramids,  an edgeedge with one Mg(1)O5 square pyramid, and  an edgeedge with one Mn(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 40-61°. The Mn(3)-O(1) bond length is 1.99 Å. The Mn(3)-O(6) bond length is 1.98 Å. The Mn(3)-O(8) bond length is 2.05 Å. There is one shorter (1.92 Å) and one longer (2.10 Å) Mn(3)-O(2) bond length. In the fourth Mn site, Mn(4) is bonded to one O(3), one O(5), two equivalent O(1), and two equivalent O(7) atoms to form distorted MnO6 octahedra that share corners with two equivalent Zn(1)O5 square pyramids, corners with two equivalent Mn(2)O5 trigonal bipyramids, corners with two equivalent Mn(3)O5 trigonal bipyramids, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Mn(4)O6 octahedra,  an edgeedge with one Zn(1)O5 square pyramid, and edges with two equivalent Mg(1)O5 square pyramids. The Mn(4)-O(3) bond length is 1.92 Å. The Mn(4)-O(5) bond length is 2.07 Å. There is one shorter (1.94 Å) and one longer (2.18 Å) Mn(4)-O(1) bond length. There is one shorter (1.99 Å) and one longer (2.59 Å) Mn(4)-O(7) bond length. Zn(1) is bonded to one O(4), two equivalent O(6), and two equivalent O(7) atoms to form ZnO5 square pyramids that share corners with two equivalent Mn(4)O6 octahedra,  a cornercorner with one Mn(2)O5 trigonal bipyramid, corners with two equivalent Mn(3)O5 trigonal bipyramids,  an edgeedge with one Mn(4)O6 octahedra, edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Zn(1)O5 square pyramids, and  an edgeedge with one Mn(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 11-18°. The Zn(1)-O(4) bond length is 2.14 Å. There is one shorter (2.05 Å) and one longer (2.07 Å) Zn(1)-O(6) bond length. There is one shorter (2.06 Å) and one longer (2.20 Å) Zn(1)-O(7) bond length. There are eight inequivalent O sites. In the first O site, O(1) is bonded to one Mg(1), one Mn(3), and two equivalent Mn(4) atoms to form OMgMn3 trigonal pyramids that share corners with two equivalent O(7)Mn3Zn2 square pyramids,  a cornercorner with one O(8)Mg2Mn2 trigonal pyramid,  a cornercorner with one O(6)Mn2Zn2 trigonal pyramid, corners with two equivalent O(1)MgMn3 trigonal pyramids,  an edgeedge with one O(7)Mn3Zn2 square pyramid, edges with two equivalent O(5)Mg2Mn3 square pyramids, and  an edgeedge with one O(8)Mg2Mn2 trigonal pyramid. In the second O site, O(2) is bonded in a trigonal planar geometry to one Mn(1) and two equivalent Mn(3) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mn(4) and two equivalent Mn(2) atoms. In the fourth O site, O(4) is bonded to one Mn(2), two equivalent Mn(1), and one Zn(1) atom to form OMn3Zn trigonal pyramids that share corners with two equivalent O(5)Mg2Mn3 square pyramids,  a cornercorner with one O(8)Mg2Mn2 trigonal pyramid,  a cornercorner with one O(6)Mn2Zn2 trigonal pyramid, corners with two equivalent O(4)Mn3Zn trigonal pyramids,  an edgeedge with one O(5)Mg2Mn3 square pyramid, edges with two equivalent O(7)Mn3Zn2 square pyramids, and  an edgeedge with one O(6)Mn2Zn2 trigonal pyramid. In the fifth O site, O(5) is bonded to two equivalent Mg(1), one Mn(4), and two equivalent Mn(1) atoms to form distorted OMg2Mn3 square pyramids that share corners with two equivalent O(8)Mg2Mn2 trigonal pyramids, corners with two equivalent O(4)Mn3Zn trigonal pyramids, edges with two equivalent O(5)Mg2Mn3 square pyramids, edges with two equivalent O(7)Mn3Zn2 square pyramids,  an edgeedge with one O(8)Mg2Mn2 trigonal pyramid,  an edgeedge with one O(4)Mn3Zn trigonal pyramid, and edges with two equivalent O(1)MgMn3 trigonal pyramids. In the sixth O site, O(6) is bonded to one Mn(2), one Mn(3), and two equivalent Zn(1) atoms to form distorted OMn2Zn2 trigonal pyramids that share corners with two equivalent O(7)Mn3Zn2 square pyramids,  a cornercorner with one O(1)MgMn3 trigonal pyramid,  a cornercorner with one O(4)Mn3Zn trigonal pyramid, corners with two equivalent O(6)Mn2Zn2 trigonal pyramids,  an edgeedge with one O(7)Mn3Zn2 square pyramid,  an edgeedge with one O(8)Mg2Mn2 trigonal pyramid, and  an edgeedge with one O(4)Mn3Zn trigonal pyramid. In the seventh O site, O(7) is bonded to one Mn(1), two equivalent Mn(4), and two equivalent Zn(1) atoms to form distorted OMn3Zn2 square pyramids that share corners with two equivalent O(1)MgMn3 trigonal pyramids, corners with two equivalent O(6)Mn2Zn2 trigonal pyramids, edges with two equivalent O(5)Mg2Mn3 square pyramids, edges with two equivalent O(7)Mn3Zn2 square pyramids,  an edgeedge with one O(1)MgMn3 trigonal pyramid,  an edgeedge with one O(6)Mn2Zn2 trigonal pyramid, and edges with two equivalent O(4)Mn3Zn trigonal pyramids. In the eighth O site, O(8) is bonded to two equivalent Mg(1), one Mn(2), and one Mn(3) atom to form distorted OMg2Mn2 trigonal pyramids that share corners with two equivalent O(5)Mg2Mn3 square pyramids,  a cornercorner with one O(1)MgMn3 trigonal pyramid,  a cornercorner with one O(4)Mn3Zn trigonal pyramid, corners with two equivalent O(8)Mg2Mn2 trigonal pyramids,  an edgeedge with one O(5)Mg2Mn3 square pyramid,  an edgeedge with one O(1)MgMn3 trigonal pyramid, and  an edgeedge with one O(6)Mn2Zn2 trigonal pyramid.