MgSm4Ti2Mn2O12 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(6), and one O(9) atom to form MgO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one Mn(2)O6 octahedra, and  an edgeedge with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-76°. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(2), one O(5), one O(7), one O(8), and one O(9) atom. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(2), one O(7), one O(8), and one O(9) atom. In the third Sm site, Sm(3) is bonded in a 7-coordinate geometry to one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. In the fourth Sm site, Sm(4) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), and one O(8) atom. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(10), one O(12), one O(2), one O(4), one O(5), and one O(7) atom to form TiO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with four equivalent Mn(1)O6 octahedra, and  a cornercorner with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-47°. In the second Ti site, Ti(2) is bonded in a 5-coordinate geometry to one O(1), one O(11), one O(3), one O(6), and one O(8) atom. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(7) atom to form MnO6 octahedra that share corners with four equivalent Ti(1)O6 octahedra and  a cornercorner with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-40°. In the second Mn site, Mn(2) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form distorted MnO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-47°. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), one Ti(2), and one Mn(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), one Ti(1), and one Mn(2) atom. In the third O site, O(3) is bonded to one Sm(3), one Sm(4), one Ti(2), and one Mn(1) atom to form distorted OSm2TiMn tetrahedra that share corners with two equivalent O(4)Sm2TiMn trigonal pyramids,  an edgeedge with one O(7)Sm3TiMn square pyramid, and  an edgeedge with one O(10)Sm3TiMn trigonal bipyramid. In the fourth O site, O(4) is bonded to one Sm(3), one Sm(4), one Ti(1), and one Mn(2) atom to form distorted OSm2TiMn trigonal pyramids that share corners with two equivalent O(3)Sm2TiMn tetrahedra,  an edgeedge with one O(7)Sm3TiMn square pyramid, and  an edgeedge with one O(10)Sm3TiMn trigonal bipyramid. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Sm(1), one Sm(3), one Sm(4), one Ti(1), and one Mn(1) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Mg(1), one Sm(3), one Sm(4), one Ti(2), and one Mn(2) atom. In the seventh O site, O(7) is bonded to one Sm(1), one Sm(2), one Sm(3), one Ti(1), and one Mn(1) atom to form distorted OSm3TiMn square pyramids that share  an edgeedge with one O(3)Sm2TiMn tetrahedra, edges with two equivalent O(10)Sm3TiMn trigonal bipyramids, and  an edgeedge with one O(4)Sm2TiMn trigonal pyramid. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Sm(1), one Sm(2), one Sm(4), one Ti(2), and one Mn(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Mn(2) atom. In the tenth O site, O(10) is bonded to one Sm(1), one Sm(2), one Sm(4), one Ti(1), and one Mn(1) atom to form distorted OSm3TiMn trigonal bipyramids that share edges with two equivalent O(7)Sm3TiMn square pyramids,  an edgeedge with one O(3)Sm2TiMn tetrahedra, and  an edgeedge with one O(4)Sm2TiMn trigonal pyramid. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sm(3), one Sm(4), one Ti(2), and one Mn(2) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sm(3), one Sm(4), one Ti(1), and one Mn(1) atom.
MgSm4Ti2Mn2O12 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(2), one O(6), and one O(9) atom to form MgO4 tetrahedra that share  a cornercorner with one Ti(1)O6 octahedra,  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one Mn(2)O6 octahedra, and  an edgeedge with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-76°. The Mg(1)-O(1) bond length is 1.97 Å. The Mg(1)-O(2) bond length is 1.92 Å. The Mg(1)-O(6) bond length is 1.95 Å. The Mg(1)-O(9) bond length is 1.88 Å. There are four inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(2), one O(5), one O(7), one O(8), and one O(9) atom. The Sm(1)-O(1) bond length is 2.40 Å. The Sm(1)-O(10) bond length is 2.34 Å. The Sm(1)-O(2) bond length is 2.62 Å. The Sm(1)-O(5) bond length is 2.43 Å. The Sm(1)-O(7) bond length is 2.38 Å. The Sm(1)-O(8) bond length is 2.56 Å. The Sm(1)-O(9) bond length is 2.45 Å. In the second Sm site, Sm(2) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(2), one O(7), one O(8), and one O(9) atom. The Sm(2)-O(1) bond length is 2.46 Å. The Sm(2)-O(10) bond length is 2.28 Å. The Sm(2)-O(2) bond length is 2.60 Å. The Sm(2)-O(7) bond length is 2.49 Å. The Sm(2)-O(8) bond length is 2.36 Å. The Sm(2)-O(9) bond length is 2.39 Å. In the third Sm site, Sm(3) is bonded in a 7-coordinate geometry to one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. The Sm(3)-O(11) bond length is 2.42 Å. The Sm(3)-O(12) bond length is 2.50 Å. The Sm(3)-O(3) bond length is 2.39 Å. The Sm(3)-O(4) bond length is 2.39 Å. The Sm(3)-O(5) bond length is 2.38 Å. The Sm(3)-O(6) bond length is 2.59 Å. The Sm(3)-O(7) bond length is 2.54 Å. In the fourth Sm site, Sm(4) is bonded in a 8-coordinate geometry to one O(10), one O(11), one O(12), one O(3), one O(4), one O(5), one O(6), and one O(8) atom. The Sm(4)-O(10) bond length is 2.64 Å. The Sm(4)-O(11) bond length is 2.58 Å. The Sm(4)-O(12) bond length is 2.32 Å. The Sm(4)-O(3) bond length is 2.23 Å. The Sm(4)-O(4) bond length is 2.49 Å. The Sm(4)-O(5) bond length is 2.63 Å. The Sm(4)-O(6) bond length is 2.59 Å. The Sm(4)-O(8) bond length is 2.98 Å. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(10), one O(12), one O(2), one O(4), one O(5), and one O(7) atom to form TiO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra, corners with four equivalent Mn(1)O6 octahedra, and  a cornercorner with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-47°. The Ti(1)-O(10) bond length is 2.20 Å. The Ti(1)-O(12) bond length is 2.05 Å. The Ti(1)-O(2) bond length is 2.08 Å. The Ti(1)-O(4) bond length is 1.99 Å. The Ti(1)-O(5) bond length is 2.09 Å. The Ti(1)-O(7) bond length is 2.14 Å. In the second Ti site, Ti(2) is bonded in a 5-coordinate geometry to one O(1), one O(11), one O(3), one O(6), and one O(8) atom. The Ti(2)-O(1) bond length is 2.15 Å. The Ti(2)-O(11) bond length is 1.85 Å. The Ti(2)-O(3) bond length is 2.02 Å. The Ti(2)-O(6) bond length is 2.10 Å. The Ti(2)-O(8) bond length is 2.00 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(7) atom to form MnO6 octahedra that share corners with four equivalent Ti(1)O6 octahedra and  a cornercorner with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-40°. The Mn(1)-O(1) bond length is 2.45 Å. The Mn(1)-O(10) bond length is 2.19 Å. The Mn(1)-O(12) bond length is 2.08 Å. The Mn(1)-O(3) bond length is 2.18 Å. The Mn(1)-O(5) bond length is 2.27 Å. The Mn(1)-O(7) bond length is 2.27 Å. In the second Mn site, Mn(2) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form distorted MnO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra,  a cornercorner with one Mg(1)O4 tetrahedra, and  an edgeedge with one Mg(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-47°. The Mn(2)-O(11) bond length is 2.16 Å. The Mn(2)-O(2) bond length is 2.46 Å. The Mn(2)-O(4) bond length is 2.16 Å. The Mn(2)-O(6) bond length is 2.55 Å. The Mn(2)-O(8) bond length is 2.16 Å. The Mn(2)-O(9) bond length is 2.05 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), one Ti(2), and one Mn(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), one Ti(1), and one Mn(2) atom. In the third O site, O(3) is bonded to one Sm(3), one Sm(4), one Ti(2), and one Mn(1) atom to form distorted OSm2TiMn tetrahedra that share corners with two equivalent O(4)Sm2TiMn trigonal pyramids,  an edgeedge with one O(7)Sm3TiMn square pyramid, and  an edgeedge with one O(10)Sm3TiMn trigonal bipyramid. In the fourth O site, O(4) is bonded to one Sm(3), one Sm(4), one Ti(1), and one Mn(2) atom to form distorted OSm2TiMn trigonal pyramids that share corners with two equivalent O(3)Sm2TiMn tetrahedra,  an edgeedge with one O(7)Sm3TiMn square pyramid, and  an edgeedge with one O(10)Sm3TiMn trigonal bipyramid. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Sm(1), one Sm(3), one Sm(4), one Ti(1), and one Mn(1) atom. In the sixth O site, O(6) is bonded in a 5-coordinate geometry to one Mg(1), one Sm(3), one Sm(4), one Ti(2), and one Mn(2) atom. In the seventh O site, O(7) is bonded to one Sm(1), one Sm(2), one Sm(3), one Ti(1), and one Mn(1) atom to form distorted OSm3TiMn square pyramids that share  an edgeedge with one O(3)Sm2TiMn tetrahedra, edges with two equivalent O(10)Sm3TiMn trigonal bipyramids, and  an edgeedge with one O(4)Sm2TiMn trigonal pyramid. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Sm(1), one Sm(2), one Sm(4), one Ti(2), and one Mn(2) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Mg(1), one Sm(1), one Sm(2), and one Mn(2) atom. In the tenth O site, O(10) is bonded to one Sm(1), one Sm(2), one Sm(4), one Ti(1), and one Mn(1) atom to form distorted OSm3TiMn trigonal bipyramids that share edges with two equivalent O(7)Sm3TiMn square pyramids,  an edgeedge with one O(3)Sm2TiMn tetrahedra, and  an edgeedge with one O(4)Sm2TiMn trigonal pyramid. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sm(3), one Sm(4), one Ti(2), and one Mn(2) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Sm(3), one Sm(4), one Ti(1), and one Mn(1) atom.