MgMn(CoO3)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(5), and two equivalent O(4) atoms. Mn(1) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(6) atoms to form distorted CoO6 octahedra that share edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. In the second Co site, Co(2) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(5) atoms to form CoO6 octahedra that share edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Mn(1) and two equivalent Co(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one Co(2) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(1), and two equivalent Co(2) atoms. In the fourth O site, O(4) is bonded to two equivalent Mg(1), two equivalent Mn(1), and one Co(1) atom to form distorted OMg2Mn2Co trigonal bipyramids that share edges with two equivalent O(4)Mg2Mn2Co trigonal bipyramids and edges with two equivalent O(5)MgMnCo2 trigonal pyramids. In the fifth O site, O(5) is bonded to one Mg(1), one Mn(1), and two equivalent Co(2) atoms to form OMgMnCo2 trigonal pyramids that share corners with two equivalent O(5)MgMnCo2 trigonal pyramids and edges with two equivalent O(4)Mg2Mn2Co trigonal bipyramids. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Co(2) and two equivalent Co(1) atoms.
MgMn(CoO3)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded in a distorted rectangular see-saw-like geometry to one O(3), one O(5), and two equivalent O(4) atoms. The Mg(1)-O(3) bond length is 1.89 Å. The Mg(1)-O(5) bond length is 2.03 Å. Both Mg(1)-O(4) bond lengths are 2.07 Å. Mn(1) is bonded to one O(1), one O(5), two equivalent O(2), and two equivalent O(4) atoms to form MnO6 octahedra that share edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The Mn(1)-O(1) bond length is 1.90 Å. The Mn(1)-O(5) bond length is 1.96 Å. Both Mn(1)-O(2) bond lengths are 1.89 Å. Both Mn(1)-O(4) bond lengths are 2.08 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(6) atoms to form distorted CoO6 octahedra that share edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The Co(1)-O(3) bond length is 2.16 Å. The Co(1)-O(4) bond length is 2.27 Å. Both Co(1)-O(1) bond lengths are 1.93 Å. Both Co(1)-O(6) bond lengths are 1.92 Å. In the second Co site, Co(2) is bonded to one O(2), one O(6), two equivalent O(3), and two equivalent O(5) atoms to form CoO6 octahedra that share edges with two equivalent Mn(1)O6 octahedra, edges with two equivalent Co(1)O6 octahedra, and edges with two equivalent Co(2)O6 octahedra. The Co(2)-O(2) bond length is 2.24 Å. The Co(2)-O(6) bond length is 1.88 Å. Both Co(2)-O(3) bond lengths are 2.00 Å. There is one shorter (2.02 Å) and one longer (2.03 Å) Co(2)-O(5) bond length. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal non-coplanar geometry to one Mn(1) and two equivalent Co(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one Co(2) atom. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Co(1), and two equivalent Co(2) atoms. In the fourth O site, O(4) is bonded to two equivalent Mg(1), two equivalent Mn(1), and one Co(1) atom to form distorted OMg2Mn2Co trigonal bipyramids that share edges with two equivalent O(4)Mg2Mn2Co trigonal bipyramids and edges with two equivalent O(5)MgMnCo2 trigonal pyramids. In the fifth O site, O(5) is bonded to one Mg(1), one Mn(1), and two equivalent Co(2) atoms to form OMgMnCo2 trigonal pyramids that share corners with two equivalent O(5)MgMnCo2 trigonal pyramids and edges with two equivalent O(4)Mg2Mn2Co trigonal bipyramids. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Co(2) and two equivalent Co(1) atoms.