BaSrMn2Al9PbO20 crystallizes in the triclinic P1 space group. Ba(1) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(19), one O(20), and one O(9) atom. Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(18), one O(2), and one O(9) atom. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(17), one O(18), one O(5), one O(6), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Al(5)O4 tetrahedra,  a cornercorner with one Al(6)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra,  a cornercorner with one Al(8)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. In the second Mn site, Mn(2) is bonded to one O(13), one O(16), one O(17), one O(18), one O(5), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, corners with two equivalent Al(6)O4 tetrahedra, corners with two equivalent Al(7)O4 tetrahedra,  an edgeedge with one Al(9)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. There are nine inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(11), one O(15), one O(20), and one O(3) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(9)O6 octahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra, and corners with two equivalent Al(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. In the second Al site, Al(2) is bonded to one O(12), one O(16), one O(20), and one O(4) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(8)O4 tetrahedra, and corners with two equivalent Al(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the third Al site, Al(3) is bonded to one O(1), one O(13), one O(19), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Al(4)O4 tetrahedra,  a cornercorner with one Al(5)O4 tetrahedra, and corners with two equivalent Al(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the fourth Al site, Al(4) is bonded to one O(10), one O(14), one O(19), and one O(2) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(9)O6 octahedra,  a cornercorner with one Al(3)O4 tetrahedra,  a cornercorner with one Al(6)O4 tetrahedra, and corners with two equivalent Al(8)O4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. In the fifth Al site, Al(5) is bonded to one O(1), one O(11), one O(15), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Al(9)O6 octahedra,  a cornercorner with one Al(3)O4 tetrahedra, and corners with two equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-65°. In the sixth Al site, Al(6) is bonded to one O(12), one O(16), one O(2), and one O(8) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Al(4)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-65°. In the seventh Al site, Al(7) is bonded to one O(13), one O(3), one O(5), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-62°. In the eighth Al site, Al(8) is bonded to one O(10), one O(14), one O(4), and one O(6) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Al(9)O6 octahedra,  a cornercorner with one Al(2)O4 tetrahedra, and corners with two equivalent Al(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-66°. In the ninth Al site, Al(9) is bonded to one O(14), one O(15), one O(17), one O(18), one O(6), and one O(7) atom to form AlO6 octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(4)O4 tetrahedra, corners with two equivalent Al(5)O4 tetrahedra, corners with two equivalent Al(8)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. Pb(1) is bonded in a 5-coordinate geometry to one O(11), one O(12), one O(17), one O(3), and one O(4) atom. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sr(1), one Al(3), and one Al(5) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Sr(1), one Al(4), and one Al(6) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Al(1), one Al(7), and one Pb(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Al(2), one Al(8), and one Pb(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Al(7) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Al(8), and one Al(9) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mn(1), one Al(5), and one Al(9) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Al(6) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Sr(1), one Al(3), and one Al(7) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Ba(1), one Sr(1), one Al(4), and one Al(8) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Al(1), one Al(5), and one Pb(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Al(2), one Al(6), and one Pb(1) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Mn(2), one Al(3), and one Al(7) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Al(4), one Al(8), and one Al(9) atom. In the fifteenth O site, O(15) is bonded in a trigonal planar geometry to one Al(1), one Al(5), and one Al(9) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Mn(2), one Al(2), and one Al(6) atom. In the seventeenth O site, O(17) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Al(9), and one Pb(1) atom. In the eighteenth O site, O(18) is bonded in a distorted tetrahedral geometry to one Sr(1), one Mn(1), one Mn(2), and one Al(9) atom. In the nineteenth O site, O(19) is bonded in a 2-coordinate geometry to one Ba(1), one Al(3), and one Al(4) atom. In the twentieth O site, O(20) is bonded in a 2-coordinate geometry to one Ba(1), one Al(1), and one Al(2) atom.
BaSrMn2Al9PbO20 crystallizes in the triclinic P1 space group. Ba(1) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(12), one O(19), one O(20), and one O(9) atom. The Ba(1)-O(10) bond length is 2.87 Å. The Ba(1)-O(11) bond length is 2.85 Å. The Ba(1)-O(12) bond length is 2.81 Å. The Ba(1)-O(19) bond length is 2.67 Å. The Ba(1)-O(20) bond length is 2.66 Å. The Ba(1)-O(9) bond length is 2.93 Å. Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(18), one O(2), and one O(9) atom. The Sr(1)-O(1) bond length is 2.54 Å. The Sr(1)-O(10) bond length is 2.67 Å. The Sr(1)-O(18) bond length is 2.48 Å. The Sr(1)-O(2) bond length is 2.59 Å. The Sr(1)-O(9) bond length is 2.66 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(17), one O(18), one O(5), one O(6), one O(7), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Al(5)O4 tetrahedra,  a cornercorner with one Al(6)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra,  a cornercorner with one Al(8)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra, and edges with two equivalent Al(9)O6 octahedra. The Mn(1)-O(17) bond length is 1.85 Å. The Mn(1)-O(18) bond length is 1.90 Å. The Mn(1)-O(5) bond length is 1.92 Å. The Mn(1)-O(6) bond length is 1.90 Å. The Mn(1)-O(7) bond length is 1.89 Å. The Mn(1)-O(8) bond length is 1.94 Å. In the second Mn site, Mn(2) is bonded to one O(13), one O(16), one O(17), one O(18), one O(5), and one O(8) atom to form MnO6 octahedra that share  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Al(3)O4 tetrahedra, corners with two equivalent Al(6)O4 tetrahedra, corners with two equivalent Al(7)O4 tetrahedra,  an edgeedge with one Al(9)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The Mn(2)-O(13) bond length is 1.96 Å. The Mn(2)-O(16) bond length is 2.10 Å. The Mn(2)-O(17) bond length is 2.25 Å. The Mn(2)-O(18) bond length is 1.97 Å. The Mn(2)-O(5) bond length is 1.93 Å. The Mn(2)-O(8) bond length is 1.95 Å. There are nine inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(11), one O(15), one O(20), and one O(3) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(9)O6 octahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Al(7)O4 tetrahedra, and corners with two equivalent Al(5)O4 tetrahedra. The corner-sharing octahedral tilt angles are 51°. The Al(1)-O(11) bond length is 1.74 Å. The Al(1)-O(15) bond length is 1.79 Å. The Al(1)-O(20) bond length is 1.74 Å. The Al(1)-O(3) bond length is 1.75 Å. In the second Al site, Al(2) is bonded to one O(12), one O(16), one O(20), and one O(4) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(8)O4 tetrahedra, and corners with two equivalent Al(6)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. The Al(2)-O(12) bond length is 1.74 Å. The Al(2)-O(16) bond length is 1.76 Å. The Al(2)-O(20) bond length is 1.75 Å. The Al(2)-O(4) bond length is 1.75 Å. In the third Al site, Al(3) is bonded to one O(1), one O(13), one O(19), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one Al(4)O4 tetrahedra,  a cornercorner with one Al(5)O4 tetrahedra, and corners with two equivalent Al(7)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. The Al(3)-O(1) bond length is 1.74 Å. The Al(3)-O(13) bond length is 1.80 Å. The Al(3)-O(19) bond length is 1.74 Å. The Al(3)-O(9) bond length is 1.75 Å. In the fourth Al site, Al(4) is bonded to one O(10), one O(14), one O(19), and one O(2) atom to form AlO4 tetrahedra that share  a cornercorner with one Al(9)O6 octahedra,  a cornercorner with one Al(3)O4 tetrahedra,  a cornercorner with one Al(6)O4 tetrahedra, and corners with two equivalent Al(8)O4 tetrahedra. The corner-sharing octahedral tilt angles are 50°. The Al(4)-O(10) bond length is 1.76 Å. The Al(4)-O(14) bond length is 1.79 Å. The Al(4)-O(19) bond length is 1.75 Å. The Al(4)-O(2) bond length is 1.74 Å. In the fifth Al site, Al(5) is bonded to one O(1), one O(11), one O(15), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Al(9)O6 octahedra,  a cornercorner with one Al(3)O4 tetrahedra, and corners with two equivalent Al(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 42-65°. The Al(5)-O(1) bond length is 1.74 Å. The Al(5)-O(11) bond length is 1.75 Å. The Al(5)-O(15) bond length is 1.79 Å. The Al(5)-O(7) bond length is 1.78 Å. In the sixth Al site, Al(6) is bonded to one O(12), one O(16), one O(2), and one O(8) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Al(4)O4 tetrahedra, and corners with two equivalent Al(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 46-65°. The Al(6)-O(12) bond length is 1.74 Å. The Al(6)-O(16) bond length is 1.76 Å. The Al(6)-O(2) bond length is 1.74 Å. The Al(6)-O(8) bond length is 1.79 Å. In the seventh Al site, Al(7) is bonded to one O(13), one O(3), one O(5), and one O(9) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Al(1)O4 tetrahedra, and corners with two equivalent Al(3)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 43-62°. The Al(7)-O(13) bond length is 1.79 Å. The Al(7)-O(3) bond length is 1.74 Å. The Al(7)-O(5) bond length is 1.78 Å. The Al(7)-O(9) bond length is 1.74 Å. In the eighth Al site, Al(8) is bonded to one O(10), one O(14), one O(4), and one O(6) atom to form AlO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Al(9)O6 octahedra,  a cornercorner with one Al(2)O4 tetrahedra, and corners with two equivalent Al(4)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-66°. The Al(8)-O(10) bond length is 1.76 Å. The Al(8)-O(14) bond length is 1.80 Å. The Al(8)-O(4) bond length is 1.75 Å. The Al(8)-O(6) bond length is 1.77 Å. In the ninth Al site, Al(9) is bonded to one O(14), one O(15), one O(17), one O(18), one O(6), and one O(7) atom to form AlO6 octahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(4)O4 tetrahedra, corners with two equivalent Al(5)O4 tetrahedra, corners with two equivalent Al(8)O4 tetrahedra,  an edgeedge with one Mn(2)O6 octahedra, and edges with two equivalent Mn(1)O6 octahedra. The Al(9)-O(14) bond length is 1.91 Å. The Al(9)-O(15) bond length is 1.89 Å. The Al(9)-O(17) bond length is 1.94 Å. The Al(9)-O(18) bond length is 2.02 Å. The Al(9)-O(6) bond length is 1.89 Å. The Al(9)-O(7) bond length is 1.91 Å. Pb(1) is bonded in a 5-coordinate geometry to one O(11), one O(12), one O(17), one O(3), and one O(4) atom. The Pb(1)-O(11) bond length is 2.78 Å. The Pb(1)-O(12) bond length is 2.80 Å. The Pb(1)-O(17) bond length is 2.37 Å. The Pb(1)-O(3) bond length is 2.40 Å. The Pb(1)-O(4) bond length is 2.36 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sr(1), one Al(3), and one Al(5) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Sr(1), one Al(4), and one Al(6) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Al(1), one Al(7), and one Pb(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Al(2), one Al(8), and one Pb(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Al(7) atom. In the sixth O site, O(6) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one Al(8), and one Al(9) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Mn(1), one Al(5), and one Al(9) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Mn(1), one Mn(2), and one Al(6) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Sr(1), one Al(3), and one Al(7) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Ba(1), one Sr(1), one Al(4), and one Al(8) atom. In the eleventh O site, O(11) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Al(1), one Al(5), and one Pb(1) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Ba(1), one Al(2), one Al(6), and one Pb(1) atom. In the thirteenth O site, O(13) is bonded in a trigonal planar geometry to one Mn(2), one Al(3), and one Al(7) atom. In the fourteenth O site, O(14) is bonded in a trigonal planar geometry to one Al(4), one Al(8), and one Al(9) atom. In the fifteenth O site, O(15) is bonded in a trigonal planar geometry to one Al(1), one Al(5), and one Al(9) atom. In the sixteenth O site, O(16) is bonded in a trigonal planar geometry to one Mn(2), one Al(2), and one Al(6) atom. In the seventeenth O site, O(17) is bonded in a distorted rectangular see-saw-like geometry to one Mn(1), one Mn(2), one Al(9), and one Pb(1) atom. In the eighteenth O site, O(18) is bonded in a distorted tetrahedral geometry to one Sr(1), one Mn(1), one Mn(2), and one Al(9) atom. In the nineteenth O site, O(19) is bonded in a 2-coordinate geometry to one Ba(1), one Al(3), and one Al(4) atom. In the twentieth O site, O(20) is bonded in a 2-coordinate geometry to one Ba(1), one Al(1), and one Al(2) atom.