SrLa3MnCuO8 is (La,Ba)CuO4-derived structured and crystallizes in the monoclinic C2 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. Mn(1) is bonded to one O(2), one O(3), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with four equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 4°. Cu(1) is bonded to one O(1), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted CuO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 4°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one La(1), two equivalent La(2), two equivalent La(3), and one Cu(1) atom. In the second O site, O(2) is bonded to one Sr(1), two equivalent La(2), two equivalent La(3), and one Mn(1) atom to form distorted OSrLa4Mn octahedra that share  a cornercorner with one O(3)Sr2La3Mn octahedra, corners with four equivalent O(2)SrLa4Mn octahedra, corners with six equivalent O(5)SrLa3MnCu octahedra, corners with six equivalent O(6)SrLa3MnCu octahedra, edges with two equivalent O(3)Sr2La3Mn octahedra, faces with two equivalent O(5)SrLa3MnCu octahedra, and faces with two equivalent O(6)SrLa3MnCu octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the third O site, O(3) is bonded to two equivalent Sr(1), one La(3), two equivalent La(1), and one Mn(1) atom to form distorted OSr2La3Mn octahedra that share  a cornercorner with one O(2)SrLa4Mn octahedra, corners with four equivalent O(3)Sr2La3Mn octahedra, corners with six equivalent O(5)SrLa3MnCu octahedra, corners with six equivalent O(6)SrLa3MnCu octahedra, edges with two equivalent O(2)SrLa4Mn octahedra, faces with two equivalent O(5)SrLa3MnCu octahedra, and faces with two equivalent O(6)SrLa3MnCu octahedra. The corner-sharing octahedral tilt angles range from 0-53°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Sr(1), one La(2), two equivalent La(1), and one Cu(1) atom. In the fifth O site, O(5) is bonded to one Sr(1), one La(1), one La(2), one La(3), one Mn(1), and one Cu(1) atom to form distorted OSrLa3MnCu octahedra that share corners with two equivalent O(5)SrLa3MnCu octahedra, corners with three equivalent O(3)Sr2La3Mn octahedra, corners with three equivalent O(2)SrLa4Mn octahedra, edges with two equivalent O(5)SrLa3MnCu octahedra,  a faceface with one O(3)Sr2La3Mn octahedra,  a faceface with one O(2)SrLa4Mn octahedra, and faces with four equivalent O(6)SrLa3MnCu octahedra. The corner-sharing octahedral tilt angles range from 2-53°. In the sixth O site, O(6) is bonded to one Sr(1), one La(1), one La(2), one La(3), one Mn(1), and one Cu(1) atom to form distorted OSrLa3MnCu octahedra that share corners with two equivalent O(6)SrLa3MnCu octahedra, corners with three equivalent O(3)Sr2La3Mn octahedra, corners with three equivalent O(2)SrLa4Mn octahedra, edges with two equivalent O(6)SrLa3MnCu octahedra,  a faceface with one O(3)Sr2La3Mn octahedra,  a faceface with one O(2)SrLa4Mn octahedra, and faces with four equivalent O(5)SrLa3MnCu octahedra. The corner-sharing octahedral tilt angles range from 3-54°.
SrLa3MnCuO8 is (La,Ba)CuO4-derived structured and crystallizes in the monoclinic C2 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. The Sr(1)-O(2) bond length is 2.49 Å. Both Sr(1)-O(3) bond lengths are 2.75 Å. Both Sr(1)-O(4) bond lengths are 2.78 Å. Both Sr(1)-O(5) bond lengths are 2.72 Å. Both Sr(1)-O(6) bond lengths are 2.72 Å. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. The La(1)-O(1) bond length is 2.26 Å. Both La(1)-O(3) bond lengths are 2.77 Å. Both La(1)-O(4) bond lengths are 2.78 Å. Both La(1)-O(5) bond lengths are 2.68 Å. Both La(1)-O(6) bond lengths are 2.67 Å. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. The La(2)-O(4) bond length is 2.26 Å. Both La(2)-O(1) bond lengths are 2.78 Å. Both La(2)-O(2) bond lengths are 2.74 Å. Both La(2)-O(5) bond lengths are 2.64 Å. Both La(2)-O(6) bond lengths are 2.63 Å. In the third La site, La(3) is bonded in a 9-coordinate geometry to one O(3), two equivalent O(1), two equivalent O(2), two equivalent O(5), and two equivalent O(6) atoms. The La(3)-O(3) bond length is 2.40 Å. Both La(3)-O(1) bond lengths are 2.79 Å. Both La(3)-O(2) bond lengths are 2.74 Å. Both La(3)-O(5) bond lengths are 2.64 Å. Both La(3)-O(6) bond lengths are 2.62 Å. Mn(1) is bonded to one O(2), one O(3), two equivalent O(5), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with four equivalent Cu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 4°. The Mn(1)-O(2) bond length is 2.18 Å. The Mn(1)-O(3) bond length is 2.30 Å. Both Mn(1)-O(5) bond lengths are 1.90 Å. Both Mn(1)-O(6) bond lengths are 1.94 Å. Cu(1) is bonded to one O(1), one O(4), two equivalent O(5), and two equivalent O(6) atoms to form distorted CuO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 4°. The Cu(1)-O(1) bond length is 2.50 Å. The Cu(1)-O(4) bond length is 2.38 Å. Both Cu(1)-O(5) bond lengths are 1.94 Å. Both Cu(1)-O(6) bond lengths are 1.92 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one La(1), two equivalent La(2), two equivalent La(3), and one Cu(1) atom. In the second O site, O(2) is bonded to one Sr(1), two equivalent La(2), two equivalent La(3), and one Mn(1) atom to form distorted OSrLa4Mn octahedra that share  a cornercorner with one O(3)Sr2La3Mn octahedra, corners with four equivalent O(2)SrLa4Mn octahedra, corners with six equivalent O(5)SrLa3MnCu octahedra, corners with six equivalent O(6)SrLa3MnCu octahedra, edges with two equivalent O(3)Sr2La3Mn octahedra, faces with two equivalent O(5)SrLa3MnCu octahedra, and faces with two equivalent O(6)SrLa3MnCu octahedra. The corner-sharing octahedral tilt angles range from 0-54°. In the third O site, O(3) is bonded to two equivalent Sr(1), one La(3), two equivalent La(1), and one Mn(1) atom to form distorted OSr2La3Mn octahedra that share  a cornercorner with one O(2)SrLa4Mn octahedra, corners with four equivalent O(3)Sr2La3Mn octahedra, corners with six equivalent O(5)SrLa3MnCu octahedra, corners with six equivalent O(6)SrLa3MnCu octahedra, edges with two equivalent O(2)SrLa4Mn octahedra, faces with two equivalent O(5)SrLa3MnCu octahedra, and faces with two equivalent O(6)SrLa3MnCu octahedra. The corner-sharing octahedral tilt angles range from 0-53°. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to two equivalent Sr(1), one La(2), two equivalent La(1), and one Cu(1) atom. In the fifth O site, O(5) is bonded to one Sr(1), one La(1), one La(2), one La(3), one Mn(1), and one Cu(1) atom to form distorted OSrLa3MnCu octahedra that share corners with two equivalent O(5)SrLa3MnCu octahedra, corners with three equivalent O(3)Sr2La3Mn octahedra, corners with three equivalent O(2)SrLa4Mn octahedra, edges with two equivalent O(5)SrLa3MnCu octahedra,  a faceface with one O(3)Sr2La3Mn octahedra,  a faceface with one O(2)SrLa4Mn octahedra, and faces with four equivalent O(6)SrLa3MnCu octahedra. The corner-sharing octahedral tilt angles range from 2-53°. In the sixth O site, O(6) is bonded to one Sr(1), one La(1), one La(2), one La(3), one Mn(1), and one Cu(1) atom to form distorted OSrLa3MnCu octahedra that share corners with two equivalent O(6)SrLa3MnCu octahedra, corners with three equivalent O(3)Sr2La3Mn octahedra, corners with three equivalent O(2)SrLa4Mn octahedra, edges with two equivalent O(6)SrLa3MnCu octahedra,  a faceface with one O(3)Sr2La3Mn octahedra,  a faceface with one O(2)SrLa4Mn octahedra, and faces with four equivalent O(5)SrLa3MnCu octahedra. The corner-sharing octahedral tilt angles range from 3-54°.