Sr2Mg2La4RuO12 is (La,Ba)CuO4-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(6), and four equivalent O(8) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to four equivalent O(8) and five equivalent O(9) atoms. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(2), one O(7), and four equivalent O(1) atoms to form corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second Mg site, Mg(2) is bonded to one O(4), one O(5), and four equivalent O(3) atoms to form corner-sharing MgO6 octahedra. The corner-sharing octahedra are not tilted. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(4), four equivalent O(1), and four equivalent O(7) atoms. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(6), four equivalent O(1), and four equivalent O(2) atoms. In the third La site, La(3) is bonded in a 9-coordinate geometry to four equivalent O(3) and five equivalent O(5) atoms. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one O(7), four equivalent O(3), and four equivalent O(4) atoms. Ru(1) is bonded to one O(6), one O(9), and four equivalent O(8) atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are nine inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1), two equivalent La(1), and two equivalent La(2) atoms to form distorted OLa4Mg2 octahedra that share corners with two equivalent O(1)La4Mg2 octahedra, corners with two equivalent O(6)Sr4LaRu octahedra, edges with two equivalent O(1)La4Mg2 octahedra, and faces with four equivalent O(1)La4Mg2 octahedra. The corner-sharing octahedral tilt angles range from 1-53°. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Sr(1), one Mg(1), and four equivalent La(2) atoms. In the third O site, O(3) is bonded to two equivalent Mg(2), two equivalent La(3), and two equivalent La(4) atoms to form a mixture of distorted corner, edge, and face-sharing OLa4Mg2 octahedra. The corner-sharing octahedra are not tilted. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Mg(2), one La(1), and four equivalent La(4) atoms. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Mg(2) and five equivalent La(3) atoms. In the sixth O site, O(6) is bonded to four equivalent Sr(1), one La(2), and one Ru(1) atom to form OSr4LaRu octahedra that share  a cornercorner with one O(9)Sr5Ru octahedra, corners with four equivalent O(1)La4Mg2 octahedra, corners with four equivalent O(6)Sr4LaRu octahedra, corners with eight equivalent O(8)Sr4Ru2 octahedra, edges with four equivalent O(6)Sr4LaRu octahedra, and faces with four equivalent O(8)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Mg(1), one La(4), and four equivalent La(1) atoms. In the eighth O site, O(8) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Ru(1) atoms to form OSr4Ru2 octahedra that share corners with two equivalent O(8)Sr4Ru2 octahedra, corners with four equivalent O(6)Sr4LaRu octahedra, corners with six equivalent O(9)Sr5Ru octahedra, edges with two equivalent O(8)Sr4Ru2 octahedra, faces with two equivalent O(6)Sr4LaRu octahedra, faces with two equivalent O(9)Sr5Ru octahedra, and faces with four equivalent O(8)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 1-56°. In the ninth O site, O(9) is bonded to five equivalent Sr(2) and one Ru(1) atom to form OSr5Ru octahedra that share  a cornercorner with one O(6)Sr4LaRu octahedra, corners with four equivalent O(9)Sr5Ru octahedra, corners with twelve equivalent O(8)Sr4Ru2 octahedra, edges with eight equivalent O(9)Sr5Ru octahedra, and faces with four equivalent O(8)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 0-56°.
Sr2Mg2La4RuO12 is (La,Ba)CuO4-derived structured and crystallizes in the monoclinic C2/m space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(6), and four equivalent O(8) atoms. The Sr(1)-O(2) bond length is 2.35 Å. There are two shorter (2.79 Å) and two longer (2.81 Å) Sr(1)-O(6) bond lengths. There are two shorter (2.69 Å) and two longer (2.71 Å) Sr(1)-O(8) bond lengths. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to four equivalent O(8) and five equivalent O(9) atoms. There are two shorter (2.70 Å) and two longer (2.71 Å) Sr(2)-O(8) bond lengths. There are a spread of Sr(2)-O(9) bond distances ranging from 2.42-2.82 Å. There are two inequivalent Mg sites. In the first Mg site, Mg(1) is bonded to one O(2), one O(7), and four equivalent O(1) atoms to form corner-sharing MgO6 octahedra. The corner-sharing octahedral tilt angles are 1°. The Mg(1)-O(2) bond length is 2.17 Å. The Mg(1)-O(7) bond length is 2.26 Å. All Mg(1)-O(1) bond lengths are 1.97 Å. In the second Mg site, Mg(2) is bonded to one O(4), one O(5), and four equivalent O(3) atoms to form corner-sharing MgO6 octahedra. The corner-sharing octahedra are not tilted. The Mg(2)-O(4) bond length is 2.24 Å. The Mg(2)-O(5) bond length is 2.25 Å. All Mg(2)-O(3) bond lengths are 1.97 Å. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 9-coordinate geometry to one O(4), four equivalent O(1), and four equivalent O(7) atoms. The La(1)-O(4) bond length is 2.32 Å. There are two shorter (2.57 Å) and two longer (2.66 Å) La(1)-O(1) bond lengths. There are a spread of La(1)-O(7) bond distances ranging from 2.64-3.04 Å. In the second La site, La(2) is bonded in a 9-coordinate geometry to one O(6), four equivalent O(1), and four equivalent O(2) atoms. The La(2)-O(6) bond length is 2.50 Å. There are two shorter (2.54 Å) and two longer (2.73 Å) La(2)-O(1) bond lengths. There are a spread of La(2)-O(2) bond distances ranging from 2.47-3.18 Å. In the third La site, La(3) is bonded in a 9-coordinate geometry to four equivalent O(3) and five equivalent O(5) atoms. There are two shorter (2.57 Å) and two longer (2.67 Å) La(3)-O(3) bond lengths. There are a spread of La(3)-O(5) bond distances ranging from 2.32-3.03 Å. In the fourth La site, La(4) is bonded in a 9-coordinate geometry to one O(7), four equivalent O(3), and four equivalent O(4) atoms. The La(4)-O(7) bond length is 2.32 Å. There are two shorter (2.57 Å) and two longer (2.66 Å) La(4)-O(3) bond lengths. There are a spread of La(4)-O(4) bond distances ranging from 2.66-3.02 Å. Ru(1) is bonded to one O(6), one O(9), and four equivalent O(8) atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedral tilt angles are 1°. The Ru(1)-O(6) bond length is 2.11 Å. The Ru(1)-O(9) bond length is 2.08 Å. All Ru(1)-O(8) bond lengths are 1.97 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Mg(1), two equivalent La(1), and two equivalent La(2) atoms to form distorted OLa4Mg2 octahedra that share corners with two equivalent O(1)La4Mg2 octahedra, corners with two equivalent O(6)Sr4LaRu octahedra, edges with two equivalent O(1)La4Mg2 octahedra, and faces with four equivalent O(1)La4Mg2 octahedra. The corner-sharing octahedral tilt angles range from 1-53°. In the second O site, O(2) is bonded in a 6-coordinate geometry to one Sr(1), one Mg(1), and four equivalent La(2) atoms. In the third O site, O(3) is bonded to two equivalent Mg(2), two equivalent La(3), and two equivalent La(4) atoms to form a mixture of distorted corner, edge, and face-sharing OLa4Mg2 octahedra. The corner-sharing octahedra are not tilted. In the fourth O site, O(4) is bonded in a 6-coordinate geometry to one Mg(2), one La(1), and four equivalent La(4) atoms. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to one Mg(2) and five equivalent La(3) atoms. In the sixth O site, O(6) is bonded to four equivalent Sr(1), one La(2), and one Ru(1) atom to form OSr4LaRu octahedra that share  a cornercorner with one O(9)Sr5Ru octahedra, corners with four equivalent O(1)La4Mg2 octahedra, corners with four equivalent O(6)Sr4LaRu octahedra, corners with eight equivalent O(8)Sr4Ru2 octahedra, edges with four equivalent O(6)Sr4LaRu octahedra, and faces with four equivalent O(8)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to one Mg(1), one La(4), and four equivalent La(1) atoms. In the eighth O site, O(8) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Ru(1) atoms to form OSr4Ru2 octahedra that share corners with two equivalent O(8)Sr4Ru2 octahedra, corners with four equivalent O(6)Sr4LaRu octahedra, corners with six equivalent O(9)Sr5Ru octahedra, edges with two equivalent O(8)Sr4Ru2 octahedra, faces with two equivalent O(6)Sr4LaRu octahedra, faces with two equivalent O(9)Sr5Ru octahedra, and faces with four equivalent O(8)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 1-56°. In the ninth O site, O(9) is bonded to five equivalent Sr(2) and one Ru(1) atom to form OSr5Ru octahedra that share  a cornercorner with one O(6)Sr4LaRu octahedra, corners with four equivalent O(9)Sr5Ru octahedra, corners with twelve equivalent O(8)Sr4Ru2 octahedra, edges with eight equivalent O(9)Sr5Ru octahedra, and faces with four equivalent O(8)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 0-56°.