SrCa3Mn4O10 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(10), one O(14), one O(15), one O(17), one O(4), one O(7), one O(8), and one O(9) atom. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(13), one O(14), one O(15), one O(18), one O(2), and one O(4) atom. There are six inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(17), one O(18), one O(3), one O(6), and one O(8) atom. In the second Ca site, Ca(2) is bonded in a 7-coordinate geometry to one O(10), one O(16), one O(19), one O(2), one O(20), one O(7), and one O(9) atom. In the third Ca site, Ca(3) is bonded in a 6-coordinate geometry to one O(16), one O(20), one O(3), one O(5), one O(6), and one O(8) atom. In the fourth Ca site, Ca(4) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(15), one O(17), one O(18), and one O(5) atom. In the fifth Ca site, Ca(5) is bonded in a 5-coordinate geometry to one O(11), one O(13), one O(19), one O(2), and one O(20) atom. In the sixth Ca site, Ca(6) is bonded in a 6-coordinate geometry to one O(1), one O(12), one O(13), one O(19), one O(5), and one O(6) atom. There are eight inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(14), and one O(7) atom. In the second Mn site, Mn(2) is bonded to one O(1), one O(11), one O(15), one O(16), and one O(8) atom to form corner-sharing MnO5 square pyramids. The corner-sharing octahedral tilt angles range from 14-34°. In the third Mn site, Mn(3) is bonded to one O(12), one O(14), one O(2), one O(3), and one O(9) atom to form MnO5 trigonal bipyramids that share corners with two equivalent Mn(4)O6 octahedra and corners with two equivalent Mn(7)O5 square pyramids. The corner-sharing octahedral tilt angles range from 24-26°. In the fourth Mn site, Mn(4) is bonded to one O(10), one O(13), one O(15), one O(16), one O(2), and one O(3) atom to form corner-sharing MnO6 octahedra. In the fifth Mn site, Mn(5) is bonded to one O(17), one O(19), one O(4), one O(5), and one O(7) atom to form MnO5 square pyramids that share corners with two equivalent Mn(6)O6 octahedra and corners with two equivalent Mn(7)O5 square pyramids. The corner-sharing octahedral tilt angles range from 23-26°. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(18), one O(20), one O(4), one O(5), and one O(8) atom to form corner-sharing MnO6 octahedra. In the seventh Mn site, Mn(7) is bonded to one O(12), one O(17), one O(19), one O(6), and one O(9) atom to form corner-sharing MnO5 square pyramids. In the eighth Mn site, Mn(8) is bonded to one O(10), one O(13), one O(18), one O(20), and one O(6) atom to form MnO5 square pyramids that share corners with two equivalent Mn(4)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  a cornercorner with one Mn(7)O5 square pyramid. The corner-sharing octahedral tilt angles range from 14-27°. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Ca(4), one Ca(6), one Mn(1), and one Mn(2) atom to form distorted corner-sharing OCa2Mn2 tetrahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Sr(2), one Ca(2), one Ca(5), one Mn(3), and one Mn(4) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ca(3), one Mn(3), and one Mn(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mn(5), and one Mn(6) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Ca(3), one Ca(4), one Ca(6), one Mn(5), and one Mn(6) atom. In the sixth O site, O(6) is bonded to one Ca(1), one Ca(3), one Ca(6), one Mn(7), and one Mn(8) atom to form distorted corner-sharing OCa3Mn2 trigonal bipyramids. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Ca(2), one Mn(1), and one Mn(5) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Sr(1), one Ca(1), one Ca(3), one Mn(2), and one Mn(6) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sr(1), one Ca(2), one Mn(3), and one Mn(7) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Sr(1), one Ca(1), one Ca(2), one Mn(4), and one Mn(8) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(2), one Ca(5), one Mn(2), and one Mn(6) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Sr(2), one Ca(4), one Ca(6), one Mn(3), and one Mn(7) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Sr(2), one Ca(5), one Ca(6), one Mn(4), and one Mn(8) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mn(1), and one Mn(3) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Ca(1), one Ca(4), one Mn(2), and one Mn(4) atom. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Ca(2), one Ca(3), one Mn(2), and one Mn(4) atom. In the seventeenth O site, O(17) is bonded in a 5-coordinate geometry to one Sr(1), one Ca(1), one Ca(4), one Mn(5), and one Mn(7) atom. In the eighteenth O site, O(18) is bonded in a 5-coordinate geometry to one Sr(2), one Ca(1), one Ca(4), one Mn(6), and one Mn(8) atom. In the nineteenth O site, O(19) is bonded in a 5-coordinate geometry to one Ca(2), one Ca(5), one Ca(6), one Mn(5), and one Mn(7) atom. In the twentieth O site, O(20) is bonded in a 5-coordinate geometry to one Ca(2), one Ca(3), one Ca(5), one Mn(6), and one Mn(8) atom.
SrCa3Mn4O10 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one O(10), one O(14), one O(15), one O(17), one O(4), one O(7), one O(8), and one O(9) atom. The Sr(1)-O(10) bond length is 2.48 Å. The Sr(1)-O(14) bond length is 2.67 Å. The Sr(1)-O(15) bond length is 3.01 Å. The Sr(1)-O(17) bond length is 2.90 Å. The Sr(1)-O(4) bond length is 2.53 Å. The Sr(1)-O(7) bond length is 2.68 Å. The Sr(1)-O(8) bond length is 2.87 Å. The Sr(1)-O(9) bond length is 2.56 Å. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(11), one O(12), one O(13), one O(14), one O(15), one O(18), one O(2), and one O(4) atom. The Sr(2)-O(11) bond length is 2.51 Å. The Sr(2)-O(12) bond length is 3.00 Å. The Sr(2)-O(13) bond length is 2.84 Å. The Sr(2)-O(14) bond length is 2.59 Å. The Sr(2)-O(15) bond length is 2.57 Å. The Sr(2)-O(18) bond length is 2.64 Å. The Sr(2)-O(2) bond length is 2.67 Å. The Sr(2)-O(4) bond length is 2.58 Å. There are six inequivalent Ca sites. In the first Ca site, Ca(1) is bonded in a 6-coordinate geometry to one O(10), one O(15), one O(17), one O(18), one O(3), one O(6), and one O(8) atom. The Ca(1)-O(10) bond length is 2.43 Å. The Ca(1)-O(15) bond length is 2.92 Å. The Ca(1)-O(17) bond length is 2.64 Å. The Ca(1)-O(18) bond length is 2.52 Å. The Ca(1)-O(3) bond length is 2.51 Å. The Ca(1)-O(6) bond length is 2.49 Å. The Ca(1)-O(8) bond length is 2.35 Å. In the second Ca site, Ca(2) is bonded in a 7-coordinate geometry to one O(10), one O(16), one O(19), one O(2), one O(20), one O(7), and one O(9) atom. The Ca(2)-O(10) bond length is 2.43 Å. The Ca(2)-O(16) bond length is 2.39 Å. The Ca(2)-O(19) bond length is 2.65 Å. The Ca(2)-O(2) bond length is 2.75 Å. The Ca(2)-O(20) bond length is 2.38 Å. The Ca(2)-O(7) bond length is 2.31 Å. The Ca(2)-O(9) bond length is 2.33 Å. In the third Ca site, Ca(3) is bonded in a 6-coordinate geometry to one O(16), one O(20), one O(3), one O(5), one O(6), and one O(8) atom. The Ca(3)-O(16) bond length is 2.43 Å. The Ca(3)-O(20) bond length is 2.50 Å. The Ca(3)-O(3) bond length is 2.42 Å. The Ca(3)-O(5) bond length is 2.68 Å. The Ca(3)-O(6) bond length is 2.32 Å. The Ca(3)-O(8) bond length is 2.40 Å. In the fourth Ca site, Ca(4) is bonded in a 5-coordinate geometry to one O(1), one O(12), one O(15), one O(17), one O(18), and one O(5) atom. The Ca(4)-O(1) bond length is 2.56 Å. The Ca(4)-O(12) bond length is 2.52 Å. The Ca(4)-O(15) bond length is 2.56 Å. The Ca(4)-O(17) bond length is 2.50 Å. The Ca(4)-O(18) bond length is 2.35 Å. The Ca(4)-O(5) bond length is 2.75 Å. In the fifth Ca site, Ca(5) is bonded in a 5-coordinate geometry to one O(11), one O(13), one O(19), one O(2), and one O(20) atom. The Ca(5)-O(11) bond length is 2.24 Å. The Ca(5)-O(13) bond length is 2.33 Å. The Ca(5)-O(19) bond length is 2.42 Å. The Ca(5)-O(2) bond length is 2.44 Å. The Ca(5)-O(20) bond length is 2.46 Å. In the sixth Ca site, Ca(6) is bonded in a 6-coordinate geometry to one O(1), one O(12), one O(13), one O(19), one O(5), and one O(6) atom. The Ca(6)-O(1) bond length is 2.30 Å. The Ca(6)-O(12) bond length is 2.47 Å. The Ca(6)-O(13) bond length is 2.38 Å. The Ca(6)-O(19) bond length is 2.74 Å. The Ca(6)-O(5) bond length is 2.34 Å. The Ca(6)-O(6) bond length is 2.47 Å. There are eight inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(14), and one O(7) atom. The Mn(1)-O(1) bond length is 1.83 Å. The Mn(1)-O(14) bond length is 1.83 Å. The Mn(1)-O(7) bond length is 1.83 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(11), one O(15), one O(16), and one O(8) atom to form corner-sharing MnO5 square pyramids. The corner-sharing octahedral tilt angles range from 14-34°. The Mn(2)-O(1) bond length is 2.16 Å. The Mn(2)-O(11) bond length is 1.92 Å. The Mn(2)-O(15) bond length is 1.99 Å. The Mn(2)-O(16) bond length is 1.96 Å. The Mn(2)-O(8) bond length is 1.95 Å. In the third Mn site, Mn(3) is bonded to one O(12), one O(14), one O(2), one O(3), and one O(9) atom to form MnO5 trigonal bipyramids that share corners with two equivalent Mn(4)O6 octahedra and corners with two equivalent Mn(7)O5 square pyramids. The corner-sharing octahedral tilt angles range from 24-26°. The Mn(3)-O(12) bond length is 2.04 Å. The Mn(3)-O(14) bond length is 2.08 Å. The Mn(3)-O(2) bond length is 1.92 Å. The Mn(3)-O(3) bond length is 1.95 Å. The Mn(3)-O(9) bond length is 2.07 Å. In the fourth Mn site, Mn(4) is bonded to one O(10), one O(13), one O(15), one O(16), one O(2), and one O(3) atom to form corner-sharing MnO6 octahedra. The Mn(4)-O(10) bond length is 2.20 Å. The Mn(4)-O(13) bond length is 2.13 Å. The Mn(4)-O(15) bond length is 1.98 Å. The Mn(4)-O(16) bond length is 1.97 Å. The Mn(4)-O(2) bond length is 2.06 Å. The Mn(4)-O(3) bond length is 2.02 Å. In the fifth Mn site, Mn(5) is bonded to one O(17), one O(19), one O(4), one O(5), and one O(7) atom to form MnO5 square pyramids that share corners with two equivalent Mn(6)O6 octahedra and corners with two equivalent Mn(7)O5 square pyramids. The corner-sharing octahedral tilt angles range from 23-26°. The Mn(5)-O(17) bond length is 2.00 Å. The Mn(5)-O(19) bond length is 2.02 Å. The Mn(5)-O(4) bond length is 1.97 Å. The Mn(5)-O(5) bond length is 1.98 Å. The Mn(5)-O(7) bond length is 2.14 Å. In the sixth Mn site, Mn(6) is bonded to one O(11), one O(18), one O(20), one O(4), one O(5), and one O(8) atom to form corner-sharing MnO6 octahedra. The Mn(6)-O(11) bond length is 2.22 Å. The Mn(6)-O(18) bond length is 2.01 Å. The Mn(6)-O(20) bond length is 2.01 Å. The Mn(6)-O(4) bond length is 1.97 Å. The Mn(6)-O(5) bond length is 2.02 Å. The Mn(6)-O(8) bond length is 2.24 Å. In the seventh Mn site, Mn(7) is bonded to one O(12), one O(17), one O(19), one O(6), and one O(9) atom to form corner-sharing MnO5 square pyramids. The Mn(7)-O(12) bond length is 2.03 Å. The Mn(7)-O(17) bond length is 1.98 Å. The Mn(7)-O(19) bond length is 1.99 Å. The Mn(7)-O(6) bond length is 1.94 Å. The Mn(7)-O(9) bond length is 2.00 Å. In the eighth Mn site, Mn(8) is bonded to one O(10), one O(13), one O(18), one O(20), and one O(6) atom to form MnO5 square pyramids that share corners with two equivalent Mn(4)O6 octahedra, corners with two equivalent Mn(6)O6 octahedra, and  a cornercorner with one Mn(7)O5 square pyramid. The corner-sharing octahedral tilt angles range from 14-27°. The Mn(8)-O(10) bond length is 1.92 Å. The Mn(8)-O(13) bond length is 1.90 Å. The Mn(8)-O(18) bond length is 1.94 Å. The Mn(8)-O(20) bond length is 1.94 Å. The Mn(8)-O(6) bond length is 1.91 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Ca(4), one Ca(6), one Mn(1), and one Mn(2) atom to form distorted corner-sharing OCa2Mn2 tetrahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Sr(2), one Ca(2), one Ca(5), one Mn(3), and one Mn(4) atom. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Ca(1), one Ca(3), one Mn(3), and one Mn(4) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mn(5), and one Mn(6) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Ca(3), one Ca(4), one Ca(6), one Mn(5), and one Mn(6) atom. In the sixth O site, O(6) is bonded to one Ca(1), one Ca(3), one Ca(6), one Mn(7), and one Mn(8) atom to form distorted corner-sharing OCa3Mn2 trigonal bipyramids. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Ca(2), one Mn(1), and one Mn(5) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Sr(1), one Ca(1), one Ca(3), one Mn(2), and one Mn(6) atom. In the ninth O site, O(9) is bonded in a 4-coordinate geometry to one Sr(1), one Ca(2), one Mn(3), and one Mn(7) atom. In the tenth O site, O(10) is bonded in a 5-coordinate geometry to one Sr(1), one Ca(1), one Ca(2), one Mn(4), and one Mn(8) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(2), one Ca(5), one Mn(2), and one Mn(6) atom. In the twelfth O site, O(12) is bonded in a 5-coordinate geometry to one Sr(2), one Ca(4), one Ca(6), one Mn(3), and one Mn(7) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Sr(2), one Ca(5), one Ca(6), one Mn(4), and one Mn(8) atom. In the fourteenth O site, O(14) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mn(1), and one Mn(3) atom. In the fifteenth O site, O(15) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Ca(1), one Ca(4), one Mn(2), and one Mn(4) atom. In the sixteenth O site, O(16) is bonded in a distorted rectangular see-saw-like geometry to one Ca(2), one Ca(3), one Mn(2), and one Mn(4) atom. In the seventeenth O site, O(17) is bonded in a 5-coordinate geometry to one Sr(1), one Ca(1), one Ca(4), one Mn(5), and one Mn(7) atom. In the eighteenth O site, O(18) is bonded in a 5-coordinate geometry to one Sr(2), one Ca(1), one Ca(4), one Mn(6), and one Mn(8) atom. In the nineteenth O site, O(19) is bonded in a 5-coordinate geometry to one Ca(2), one Ca(5), one Ca(6), one Mn(5), and one Mn(7) atom. In the twentieth O site, O(20) is bonded in a 5-coordinate geometry to one Ca(2), one Ca(3), one Ca(5), one Mn(6), and one Mn(8) atom.