Sr3LaMn4O10 crystallizes in the monoclinic Pm space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 10-coordinate geometry to one O(8), one O(9), two equivalent O(10), two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to one O(8), one O(9), two equivalent O(1), two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms. In the third Sr site, Sr(3) is bonded in a 10-coordinate geometry to one O(10), one O(7), two equivalent O(2), two equivalent O(4), two equivalent O(5), and two equivalent O(8) atoms. La(1) is bonded in a 10-coordinate geometry to one O(10), one O(7), two equivalent O(1), two equivalent O(3), two equivalent O(6), and two equivalent O(9) atoms. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(3), one O(5), and two equivalent O(7) atoms to form corner-sharing MnO5 square pyramids. In the second Mn site, Mn(2) is bonded to one O(2), one O(4), one O(5), and two equivalent O(8) atoms to form corner-sharing MnO5 square pyramids. In the third Mn site, Mn(3) is bonded to one O(1), one O(3), one O(6), and two equivalent O(9) atoms to form corner-sharing MnO5 square pyramids. In the fourth Mn site, Mn(4) is bonded to one O(2), one O(4), one O(6), and two equivalent O(10) atoms to form corner-sharing MnO5 trigonal bipyramids. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Sr(2), two equivalent La(1), one Mn(1), and one Mn(3) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Mn(2), and one Mn(4) atom to form distorted OSr4Mn2 octahedra that share corners with two equivalent O(6)Sr2La2Mn2 octahedra, corners with two equivalent O(7)Sr3LaMn2 octahedra, corners with three equivalent O(5)Sr4Mn2 octahedra,  an edgeedge with one O(5)Sr4Mn2 octahedra, edges with two equivalent O(2)Sr4Mn2 octahedra, and  a faceface with one O(6)Sr2La2Mn2 octahedra. The corner-sharing octahedral tilt angles range from 7-72°. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(2), two equivalent La(1), one Mn(1), and one Mn(3) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(3), one Mn(2), and one Mn(4) atom. In the fifth O site, O(5) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Mn(1), and one Mn(2) atom to form distorted OSr4Mn2 octahedra that share corners with two equivalent O(7)Sr3LaMn2 octahedra, corners with three equivalent O(2)Sr4Mn2 octahedra,  an edgeedge with one O(2)Sr4Mn2 octahedra, edges with two equivalent O(5)Sr4Mn2 octahedra, and faces with two equivalent O(7)Sr3LaMn2 octahedra. The corner-sharing octahedral tilt angles range from 7-66°. In the sixth O site, O(6) is bonded to two equivalent Sr(1), two equivalent La(1), one Mn(3), and one Mn(4) atom to form distorted OSr2La2Mn2 octahedra that share corners with two equivalent O(7)Sr3LaMn2 octahedra, corners with two equivalent O(2)Sr4Mn2 octahedra, edges with two equivalent O(6)Sr2La2Mn2 octahedra, and  a faceface with one O(2)Sr4Mn2 octahedra. The corner-sharing octahedral tilt angles are 58°. In the seventh O site, O(7) is bonded to one Sr(3), two equivalent Sr(2), one La(1), and two equivalent Mn(1) atoms to form distorted OSr3LaMn2 octahedra that share corners with two equivalent O(6)Sr2La2Mn2 octahedra, corners with two equivalent O(2)Sr4Mn2 octahedra, corners with two equivalent O(5)Sr4Mn2 octahedra, corners with four equivalent O(7)Sr3LaMn2 octahedra, and faces with two equivalent O(5)Sr4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 7-72°. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), two equivalent Sr(3), and two equivalent Mn(2) atoms. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), two equivalent La(1), and two equivalent Mn(3) atoms. In the tenth O site, O(10) is bonded in a 6-coordinate geometry to one Sr(3), two equivalent Sr(1), one La(1), and two equivalent Mn(4) atoms.
Sr3LaMn4O10 crystallizes in the monoclinic Pm space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 10-coordinate geometry to one O(8), one O(9), two equivalent O(10), two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms. The Sr(1)-O(8) bond length is 2.79 Å. The Sr(1)-O(9) bond length is 2.68 Å. There is one shorter (2.81 Å) and one longer (2.91 Å) Sr(1)-O(10) bond length. Both Sr(1)-O(2) bond lengths are 2.85 Å. Both Sr(1)-O(4) bond lengths are 2.57 Å. Both Sr(1)-O(6) bond lengths are 2.87 Å. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to one O(8), one O(9), two equivalent O(1), two equivalent O(3), two equivalent O(5), and two equivalent O(7) atoms. The Sr(2)-O(8) bond length is 2.57 Å. The Sr(2)-O(9) bond length is 2.89 Å. Both Sr(2)-O(1) bond lengths are 2.60 Å. Both Sr(2)-O(3) bond lengths are 3.11 Å. Both Sr(2)-O(5) bond lengths are 2.69 Å. There is one shorter (2.80 Å) and one longer (2.83 Å) Sr(2)-O(7) bond length. In the third Sr site, Sr(3) is bonded in a 10-coordinate geometry to one O(10), one O(7), two equivalent O(2), two equivalent O(4), two equivalent O(5), and two equivalent O(8) atoms. The Sr(3)-O(10) bond length is 3.00 Å. The Sr(3)-O(7) bond length is 2.70 Å. Both Sr(3)-O(2) bond lengths are 2.62 Å. Both Sr(3)-O(4) bond lengths are 2.92 Å. Both Sr(3)-O(5) bond lengths are 2.74 Å. There is one shorter (2.79 Å) and one longer (2.87 Å) Sr(3)-O(8) bond length. La(1) is bonded in a 10-coordinate geometry to one O(10), one O(7), two equivalent O(1), two equivalent O(3), two equivalent O(6), and two equivalent O(9) atoms. The La(1)-O(10) bond length is 2.51 Å. The La(1)-O(7) bond length is 2.74 Å. Both La(1)-O(1) bond lengths are 2.88 Å. Both La(1)-O(3) bond lengths are 2.49 Å. Both La(1)-O(6) bond lengths are 2.61 Å. There is one shorter (2.75 Å) and one longer (2.91 Å) La(1)-O(9) bond length. There are four inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(3), one O(5), and two equivalent O(7) atoms to form corner-sharing MnO5 square pyramids. The Mn(1)-O(1) bond length is 1.97 Å. The Mn(1)-O(3) bond length is 2.12 Å. The Mn(1)-O(5) bond length is 1.99 Å. Both Mn(1)-O(7) bond lengths are 1.99 Å. In the second Mn site, Mn(2) is bonded to one O(2), one O(4), one O(5), and two equivalent O(8) atoms to form corner-sharing MnO5 square pyramids. The Mn(2)-O(2) bond length is 1.96 Å. The Mn(2)-O(4) bond length is 2.07 Å. The Mn(2)-O(5) bond length is 2.01 Å. Both Mn(2)-O(8) bond lengths are 2.00 Å. In the third Mn site, Mn(3) is bonded to one O(1), one O(3), one O(6), and two equivalent O(9) atoms to form corner-sharing MnO5 square pyramids. The Mn(3)-O(1) bond length is 2.08 Å. The Mn(3)-O(3) bond length is 1.96 Å. The Mn(3)-O(6) bond length is 2.01 Å. Both Mn(3)-O(9) bond lengths are 2.00 Å. In the fourth Mn site, Mn(4) is bonded to one O(2), one O(4), one O(6), and two equivalent O(10) atoms to form corner-sharing MnO5 trigonal bipyramids. The Mn(4)-O(2) bond length is 2.06 Å. The Mn(4)-O(4) bond length is 1.92 Å. The Mn(4)-O(6) bond length is 1.99 Å. Both Mn(4)-O(10) bond lengths are 2.02 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to two equivalent Sr(2), two equivalent La(1), one Mn(1), and one Mn(3) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(3), one Mn(2), and one Mn(4) atom to form distorted OSr4Mn2 octahedra that share corners with two equivalent O(6)Sr2La2Mn2 octahedra, corners with two equivalent O(7)Sr3LaMn2 octahedra, corners with three equivalent O(5)Sr4Mn2 octahedra,  an edgeedge with one O(5)Sr4Mn2 octahedra, edges with two equivalent O(2)Sr4Mn2 octahedra, and  a faceface with one O(6)Sr2La2Mn2 octahedra. The corner-sharing octahedral tilt angles range from 7-72°. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(2), two equivalent La(1), one Mn(1), and one Mn(3) atom. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sr(3), one Mn(2), and one Mn(4) atom. In the fifth O site, O(5) is bonded to two equivalent Sr(2), two equivalent Sr(3), one Mn(1), and one Mn(2) atom to form distorted OSr4Mn2 octahedra that share corners with two equivalent O(7)Sr3LaMn2 octahedra, corners with three equivalent O(2)Sr4Mn2 octahedra,  an edgeedge with one O(2)Sr4Mn2 octahedra, edges with two equivalent O(5)Sr4Mn2 octahedra, and faces with two equivalent O(7)Sr3LaMn2 octahedra. The corner-sharing octahedral tilt angles range from 7-66°. In the sixth O site, O(6) is bonded to two equivalent Sr(1), two equivalent La(1), one Mn(3), and one Mn(4) atom to form distorted OSr2La2Mn2 octahedra that share corners with two equivalent O(7)Sr3LaMn2 octahedra, corners with two equivalent O(2)Sr4Mn2 octahedra, edges with two equivalent O(6)Sr2La2Mn2 octahedra, and  a faceface with one O(2)Sr4Mn2 octahedra. The corner-sharing octahedral tilt angles are 58°. In the seventh O site, O(7) is bonded to one Sr(3), two equivalent Sr(2), one La(1), and two equivalent Mn(1) atoms to form distorted OSr3LaMn2 octahedra that share corners with two equivalent O(6)Sr2La2Mn2 octahedra, corners with two equivalent O(2)Sr4Mn2 octahedra, corners with two equivalent O(5)Sr4Mn2 octahedra, corners with four equivalent O(7)Sr3LaMn2 octahedra, and faces with two equivalent O(5)Sr4Mn2 octahedra. The corner-sharing octahedral tilt angles range from 7-72°. In the eighth O site, O(8) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), two equivalent Sr(3), and two equivalent Mn(2) atoms. In the ninth O site, O(9) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), two equivalent La(1), and two equivalent Mn(3) atoms. In the tenth O site, O(10) is bonded in a 6-coordinate geometry to one Sr(3), two equivalent Sr(1), one La(1), and two equivalent Mn(4) atoms.