MgSc2Mn4O10 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 7-coordinate geometry to one O(10), one O(7), one O(8), two equivalent O(6), and two equivalent O(9) atoms. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms. In the second Sc site, Sc(2) is bonded to one O(10), one O(6), one O(7), one O(9), and two equivalent O(8) atoms to form ScO6 octahedra that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Sc(2)O6 octahedra,  a cornercorner with one Mn(4)O5 trigonal bipyramid, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-22°. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(3), one O(6), one O(8), and two equivalent O(7) atoms to form distorted MnO6 octahedra that share  a cornercorner with one Sc(2)O6 octahedra,  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(4)O5 trigonal bipyramids, edges with two equivalent Sc(2)O6 octahedra, and  an edgeedge with one Mn(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 22-62°. In the second Mn site, Mn(2) is bonded to one O(1), one O(4), one O(8), one O(9), and two equivalent O(10) atoms to form distorted MnO6 octahedra that share  a cornercorner with one Sc(2)O6 octahedra,  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Sc(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-62°. In the third Mn site, Mn(3) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(9), and two equivalent O(4) atoms. In the fourth Mn site, Mn(4) is bonded to one O(2), one O(5), one O(6), and two equivalent O(3) atoms to form MnO5 trigonal bipyramids that share  a cornercorner with one Sc(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(4)O5 trigonal bipyramids, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 70-75°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Sc(1), one Mn(2), and one Mn(3) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Sc(1), one Mn(1), and one Mn(4) atom. In the third O site, O(3) is bonded to one Sc(1), one Mn(1), and two equivalent Mn(4) atoms to form OScMn3 trigonal pyramids that share  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with three equivalent O(6)Mg2ScMn2 trigonal bipyramids,  a cornercorner with one O(4)ScMn3 trigonal pyramid, corners with two equivalent O(7)MgScMn2 trigonal pyramids, corners with two equivalent O(3)ScMn3 trigonal pyramids, and edges with two equivalent O(5)Sc2Mn2 trigonal pyramids. In the fourth O site, O(4) is bonded to one Sc(1), one Mn(2), and two equivalent Mn(3) atoms to form OScMn3 trigonal pyramids that share  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with three equivalent O(9)Mg2ScMn2 trigonal bipyramids,  a cornercorner with one O(3)ScMn3 trigonal pyramid, corners with two equivalent O(10)MgScMn2 trigonal pyramids, corners with two equivalent O(4)ScMn3 trigonal pyramids, and edges with two equivalent O(5)Sc2Mn2 trigonal pyramids. In the fifth O site, O(5) is bonded to two equivalent Sc(1), one Mn(3), and one Mn(4) atom to form distorted OSc2Mn2 trigonal pyramids that share  a cornercorner with one O(6)Mg2ScMn2 trigonal bipyramid,  a cornercorner with one O(9)Mg2ScMn2 trigonal bipyramid, corners with two equivalent O(5)Sc2Mn2 trigonal pyramids, edges with two equivalent O(3)ScMn3 trigonal pyramids, and edges with two equivalent O(4)ScMn3 trigonal pyramids. In the sixth O site, O(6) is bonded to two equivalent Mg(1), one Sc(2), one Mn(1), and one Mn(4) atom to form distorted OMg2ScMn2 trigonal bipyramids that share  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with two equivalent O(6)Mg2ScMn2 trigonal bipyramids, corners with two equivalent O(9)Mg2ScMn2 trigonal bipyramids,  a cornercorner with one O(7)MgScMn2 trigonal pyramid,  a cornercorner with one O(5)Sc2Mn2 trigonal pyramid, corners with three equivalent O(10)MgScMn2 trigonal pyramids, corners with three equivalent O(3)ScMn3 trigonal pyramids, edges with two equivalent O(8)MgSc2Mn2 trigonal bipyramids, edges with two equivalent O(7)MgScMn2 trigonal pyramids, and  a faceface with one O(9)Mg2ScMn2 trigonal bipyramid. In the seventh O site, O(7) is bonded to one Mg(1), one Sc(2), and two equivalent Mn(1) atoms to form distorted OMgScMn2 trigonal pyramids that share  a cornercorner with one O(6)Mg2ScMn2 trigonal bipyramid,  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with three equivalent O(9)Mg2ScMn2 trigonal bipyramids, corners with two equivalent O(7)MgScMn2 trigonal pyramids, corners with two equivalent O(3)ScMn3 trigonal pyramids, edges with two equivalent O(6)Mg2ScMn2 trigonal bipyramids, edges with two equivalent O(8)MgSc2Mn2 trigonal bipyramids, and  an edgeedge with one O(10)MgScMn2 trigonal pyramid. In the eighth O site, O(8) is bonded to one Mg(1), two equivalent Sc(2), one Mn(1), and one Mn(2) atom to form distorted OMgSc2Mn2 trigonal bipyramids that share  a cornercorner with one O(6)Mg2ScMn2 trigonal bipyramid,  a cornercorner with one O(9)Mg2ScMn2 trigonal bipyramid, corners with two equivalent O(8)MgSc2Mn2 trigonal bipyramids,  a cornercorner with one O(10)MgScMn2 trigonal pyramid,  a cornercorner with one O(7)MgScMn2 trigonal pyramid,  a cornercorner with one O(3)ScMn3 trigonal pyramid,  a cornercorner with one O(4)ScMn3 trigonal pyramid, edges with two equivalent O(6)Mg2ScMn2 trigonal bipyramids, edges with two equivalent O(9)Mg2ScMn2 trigonal bipyramids, edges with two equivalent O(10)MgScMn2 trigonal pyramids, and edges with two equivalent O(7)MgScMn2 trigonal pyramids. In the ninth O site, O(9) is bonded to two equivalent Mg(1), one Sc(2), one Mn(2), and one Mn(3) atom to form OMg2ScMn2 trigonal bipyramids that share  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with two equivalent O(6)Mg2ScMn2 trigonal bipyramids, corners with two equivalent O(9)Mg2ScMn2 trigonal bipyramids,  a cornercorner with one O(10)MgScMn2 trigonal pyramid,  a cornercorner with one O(5)Sc2Mn2 trigonal pyramid, corners with three equivalent O(7)MgScMn2 trigonal pyramids, corners with three equivalent O(4)ScMn3 trigonal pyramids, edges with two equivalent O(8)MgSc2Mn2 trigonal bipyramids, edges with two equivalent O(10)MgScMn2 trigonal pyramids, and  a faceface with one O(6)Mg2ScMn2 trigonal bipyramid. In the tenth O site, O(10) is bonded to one Mg(1), one Sc(2), and two equivalent Mn(2) atoms to form distorted OMgScMn2 trigonal pyramids that share  a cornercorner with one O(9)Mg2ScMn2 trigonal bipyramid,  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with three equivalent O(6)Mg2ScMn2 trigonal bipyramids, corners with two equivalent O(10)MgScMn2 trigonal pyramids, corners with two equivalent O(4)ScMn3 trigonal pyramids, edges with two equivalent O(9)Mg2ScMn2 trigonal bipyramids, edges with two equivalent O(8)MgSc2Mn2 trigonal bipyramids, and  an edgeedge with one O(7)MgScMn2 trigonal pyramid.
MgSc2Mn4O10 crystallizes in the monoclinic Cm space group. Mg(1) is bonded in a 7-coordinate geometry to one O(10), one O(7), one O(8), two equivalent O(6), and two equivalent O(9) atoms. The Mg(1)-O(10) bond length is 2.13 Å. The Mg(1)-O(7) bond length is 2.14 Å. The Mg(1)-O(8) bond length is 2.56 Å. Both Mg(1)-O(6) bond lengths are 2.47 Å. Both Mg(1)-O(9) bond lengths are 2.29 Å. There are two inequivalent Sc sites. In the first Sc site, Sc(1) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and two equivalent O(5) atoms. The Sc(1)-O(1) bond length is 2.01 Å. The Sc(1)-O(2) bond length is 2.05 Å. The Sc(1)-O(3) bond length is 2.26 Å. The Sc(1)-O(4) bond length is 2.26 Å. Both Sc(1)-O(5) bond lengths are 2.15 Å. In the second Sc site, Sc(2) is bonded to one O(10), one O(6), one O(7), one O(9), and two equivalent O(8) atoms to form ScO6 octahedra that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Sc(2)O6 octahedra,  a cornercorner with one Mn(4)O5 trigonal bipyramid, edges with two equivalent Mn(1)O6 octahedra, and edges with two equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-22°. The Sc(2)-O(10) bond length is 2.12 Å. The Sc(2)-O(6) bond length is 2.15 Å. The Sc(2)-O(7) bond length is 2.12 Å. The Sc(2)-O(9) bond length is 2.09 Å. Both Sc(2)-O(8) bond lengths are 2.02 Å. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(2), one O(3), one O(6), one O(8), and two equivalent O(7) atoms to form distorted MnO6 octahedra that share  a cornercorner with one Sc(2)O6 octahedra,  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(4)O5 trigonal bipyramids, edges with two equivalent Sc(2)O6 octahedra, and  an edgeedge with one Mn(4)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 22-62°. The Mn(1)-O(2) bond length is 1.91 Å. The Mn(1)-O(3) bond length is 1.95 Å. The Mn(1)-O(6) bond length is 2.03 Å. The Mn(1)-O(8) bond length is 2.26 Å. Both Mn(1)-O(7) bond lengths are 2.03 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(4), one O(8), one O(9), and two equivalent O(10) atoms to form distorted MnO6 octahedra that share  a cornercorner with one Sc(2)O6 octahedra,  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Sc(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 8-62°. The Mn(2)-O(1) bond length is 1.90 Å. The Mn(2)-O(4) bond length is 1.93 Å. The Mn(2)-O(8) bond length is 2.34 Å. The Mn(2)-O(9) bond length is 2.01 Å. Both Mn(2)-O(10) bond lengths are 2.03 Å. In the third Mn site, Mn(3) is bonded in a 5-coordinate geometry to one O(1), one O(5), one O(9), and two equivalent O(4) atoms. The Mn(3)-O(1) bond length is 2.00 Å. The Mn(3)-O(5) bond length is 2.18 Å. The Mn(3)-O(9) bond length is 2.29 Å. Both Mn(3)-O(4) bond lengths are 2.11 Å. In the fourth Mn site, Mn(4) is bonded to one O(2), one O(5), one O(6), and two equivalent O(3) atoms to form MnO5 trigonal bipyramids that share  a cornercorner with one Sc(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, corners with two equivalent Mn(4)O5 trigonal bipyramids, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 70-75°. The Mn(4)-O(2) bond length is 1.98 Å. The Mn(4)-O(5) bond length is 1.96 Å. The Mn(4)-O(6) bond length is 1.96 Å. Both Mn(4)-O(3) bond lengths are 2.12 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Sc(1), one Mn(2), and one Mn(3) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Sc(1), one Mn(1), and one Mn(4) atom. In the third O site, O(3) is bonded to one Sc(1), one Mn(1), and two equivalent Mn(4) atoms to form OScMn3 trigonal pyramids that share  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with three equivalent O(6)Mg2ScMn2 trigonal bipyramids,  a cornercorner with one O(4)ScMn3 trigonal pyramid, corners with two equivalent O(7)MgScMn2 trigonal pyramids, corners with two equivalent O(3)ScMn3 trigonal pyramids, and edges with two equivalent O(5)Sc2Mn2 trigonal pyramids. In the fourth O site, O(4) is bonded to one Sc(1), one Mn(2), and two equivalent Mn(3) atoms to form OScMn3 trigonal pyramids that share  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with three equivalent O(9)Mg2ScMn2 trigonal bipyramids,  a cornercorner with one O(3)ScMn3 trigonal pyramid, corners with two equivalent O(10)MgScMn2 trigonal pyramids, corners with two equivalent O(4)ScMn3 trigonal pyramids, and edges with two equivalent O(5)Sc2Mn2 trigonal pyramids. In the fifth O site, O(5) is bonded to two equivalent Sc(1), one Mn(3), and one Mn(4) atom to form distorted OSc2Mn2 trigonal pyramids that share  a cornercorner with one O(6)Mg2ScMn2 trigonal bipyramid,  a cornercorner with one O(9)Mg2ScMn2 trigonal bipyramid, corners with two equivalent O(5)Sc2Mn2 trigonal pyramids, edges with two equivalent O(3)ScMn3 trigonal pyramids, and edges with two equivalent O(4)ScMn3 trigonal pyramids. In the sixth O site, O(6) is bonded to two equivalent Mg(1), one Sc(2), one Mn(1), and one Mn(4) atom to form distorted OMg2ScMn2 trigonal bipyramids that share  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with two equivalent O(6)Mg2ScMn2 trigonal bipyramids, corners with two equivalent O(9)Mg2ScMn2 trigonal bipyramids,  a cornercorner with one O(7)MgScMn2 trigonal pyramid,  a cornercorner with one O(5)Sc2Mn2 trigonal pyramid, corners with three equivalent O(10)MgScMn2 trigonal pyramids, corners with three equivalent O(3)ScMn3 trigonal pyramids, edges with two equivalent O(8)MgSc2Mn2 trigonal bipyramids, edges with two equivalent O(7)MgScMn2 trigonal pyramids, and  a faceface with one O(9)Mg2ScMn2 trigonal bipyramid. In the seventh O site, O(7) is bonded to one Mg(1), one Sc(2), and two equivalent Mn(1) atoms to form distorted OMgScMn2 trigonal pyramids that share  a cornercorner with one O(6)Mg2ScMn2 trigonal bipyramid,  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with three equivalent O(9)Mg2ScMn2 trigonal bipyramids, corners with two equivalent O(7)MgScMn2 trigonal pyramids, corners with two equivalent O(3)ScMn3 trigonal pyramids, edges with two equivalent O(6)Mg2ScMn2 trigonal bipyramids, edges with two equivalent O(8)MgSc2Mn2 trigonal bipyramids, and  an edgeedge with one O(10)MgScMn2 trigonal pyramid. In the eighth O site, O(8) is bonded to one Mg(1), two equivalent Sc(2), one Mn(1), and one Mn(2) atom to form distorted OMgSc2Mn2 trigonal bipyramids that share  a cornercorner with one O(6)Mg2ScMn2 trigonal bipyramid,  a cornercorner with one O(9)Mg2ScMn2 trigonal bipyramid, corners with two equivalent O(8)MgSc2Mn2 trigonal bipyramids,  a cornercorner with one O(10)MgScMn2 trigonal pyramid,  a cornercorner with one O(7)MgScMn2 trigonal pyramid,  a cornercorner with one O(3)ScMn3 trigonal pyramid,  a cornercorner with one O(4)ScMn3 trigonal pyramid, edges with two equivalent O(6)Mg2ScMn2 trigonal bipyramids, edges with two equivalent O(9)Mg2ScMn2 trigonal bipyramids, edges with two equivalent O(10)MgScMn2 trigonal pyramids, and edges with two equivalent O(7)MgScMn2 trigonal pyramids. In the ninth O site, O(9) is bonded to two equivalent Mg(1), one Sc(2), one Mn(2), and one Mn(3) atom to form OMg2ScMn2 trigonal bipyramids that share  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with two equivalent O(6)Mg2ScMn2 trigonal bipyramids, corners with two equivalent O(9)Mg2ScMn2 trigonal bipyramids,  a cornercorner with one O(10)MgScMn2 trigonal pyramid,  a cornercorner with one O(5)Sc2Mn2 trigonal pyramid, corners with three equivalent O(7)MgScMn2 trigonal pyramids, corners with three equivalent O(4)ScMn3 trigonal pyramids, edges with two equivalent O(8)MgSc2Mn2 trigonal bipyramids, edges with two equivalent O(10)MgScMn2 trigonal pyramids, and  a faceface with one O(6)Mg2ScMn2 trigonal bipyramid. In the tenth O site, O(10) is bonded to one Mg(1), one Sc(2), and two equivalent Mn(2) atoms to form distorted OMgScMn2 trigonal pyramids that share  a cornercorner with one O(9)Mg2ScMn2 trigonal bipyramid,  a cornercorner with one O(8)MgSc2Mn2 trigonal bipyramid, corners with three equivalent O(6)Mg2ScMn2 trigonal bipyramids, corners with two equivalent O(10)MgScMn2 trigonal pyramids, corners with two equivalent O(4)ScMn3 trigonal pyramids, edges with two equivalent O(9)Mg2ScMn2 trigonal bipyramids, edges with two equivalent O(8)MgSc2Mn2 trigonal bipyramids, and  an edgeedge with one O(7)MgScMn2 trigonal pyramid.