Sr2MgLa2RuO8 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal P4/mmm space group. Sr(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(1), and four equivalent O(3) atoms. Mg(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form corner-sharing MgO6 octahedra. The corner-sharing octahedra are not tilted. La(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(4) atoms. Ru(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedra are not tilted. There are four inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1), one La(1), and one Ru(1) atom to form OSr4LaRu octahedra that share corners with four equivalent O(4)La4Mg2 octahedra, corners with five equivalent O(1)Sr4LaRu octahedra, corners with eight equivalent O(3)Sr4Ru2 octahedra, edges with four equivalent O(1)Sr4LaRu octahedra, edges with four equivalent O(2)SrLa4Mg octahedra, and faces with four equivalent O(3)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. In the second O site, O(2) is bonded to one Sr(1), one Mg(1), and four equivalent La(1) atoms to form distorted OSrLa4Mg octahedra that share corners with four equivalent O(3)Sr4Ru2 octahedra, corners with five equivalent O(2)SrLa4Mg octahedra, corners with eight equivalent O(4)La4Mg2 octahedra, edges with four equivalent O(1)Sr4LaRu octahedra, edges with four equivalent O(2)SrLa4Mg octahedra, and faces with four equivalent O(4)La4Mg2 octahedra. The corner-sharing octahedral tilt angles range from 0-51°. In the third O site, O(3) is bonded to four equivalent Sr(1) and two equivalent Ru(1) atoms to form OSr4Ru2 octahedra that share corners with two equivalent O(3)Sr4Ru2 octahedra, corners with four equivalent O(2)SrLa4Mg octahedra, corners with eight equivalent O(1)Sr4LaRu octahedra, edges with two equivalent O(3)Sr4Ru2 octahedra, faces with four equivalent O(1)Sr4LaRu octahedra, and faces with four equivalent O(3)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. In the fourth O site, O(4) is bonded to two equivalent Mg(1) and four equivalent La(1) atoms to form distorted OLa4Mg2 octahedra that share corners with two equivalent O(4)La4Mg2 octahedra, corners with four equivalent O(1)Sr4LaRu octahedra, corners with eight equivalent O(2)SrLa4Mg octahedra, edges with two equivalent O(4)La4Mg2 octahedra, faces with four equivalent O(4)La4Mg2 octahedra, and faces with four equivalent O(2)SrLa4Mg octahedra. The corner-sharing octahedral tilt angles range from 0-51°.
Sr2MgLa2RuO8 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal P4/mmm space group. Sr(1) is bonded in a 9-coordinate geometry to one O(2), four equivalent O(1), and four equivalent O(3) atoms. The Sr(1)-O(2) bond length is 2.34 Å. All Sr(1)-O(1) bond lengths are 2.77 Å. All Sr(1)-O(3) bond lengths are 2.69 Å. Mg(1) is bonded to two equivalent O(2) and four equivalent O(4) atoms to form corner-sharing MgO6 octahedra. The corner-sharing octahedra are not tilted. Both Mg(1)-O(2) bond lengths are 2.18 Å. All Mg(1)-O(4) bond lengths are 1.95 Å. La(1) is bonded in a 9-coordinate geometry to one O(1), four equivalent O(2), and four equivalent O(4) atoms. The La(1)-O(1) bond length is 2.50 Å. All La(1)-O(2) bond lengths are 2.79 Å. All La(1)-O(4) bond lengths are 2.62 Å. Ru(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedra are not tilted. Both Ru(1)-O(1) bond lengths are 2.13 Å. All Ru(1)-O(3) bond lengths are 1.95 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1), one La(1), and one Ru(1) atom to form OSr4LaRu octahedra that share corners with four equivalent O(4)La4Mg2 octahedra, corners with five equivalent O(1)Sr4LaRu octahedra, corners with eight equivalent O(3)Sr4Ru2 octahedra, edges with four equivalent O(1)Sr4LaRu octahedra, edges with four equivalent O(2)SrLa4Mg octahedra, and faces with four equivalent O(3)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. In the second O site, O(2) is bonded to one Sr(1), one Mg(1), and four equivalent La(1) atoms to form distorted OSrLa4Mg octahedra that share corners with four equivalent O(3)Sr4Ru2 octahedra, corners with five equivalent O(2)SrLa4Mg octahedra, corners with eight equivalent O(4)La4Mg2 octahedra, edges with four equivalent O(1)Sr4LaRu octahedra, edges with four equivalent O(2)SrLa4Mg octahedra, and faces with four equivalent O(4)La4Mg2 octahedra. The corner-sharing octahedral tilt angles range from 0-51°. In the third O site, O(3) is bonded to four equivalent Sr(1) and two equivalent Ru(1) atoms to form OSr4Ru2 octahedra that share corners with two equivalent O(3)Sr4Ru2 octahedra, corners with four equivalent O(2)SrLa4Mg octahedra, corners with eight equivalent O(1)Sr4LaRu octahedra, edges with two equivalent O(3)Sr4Ru2 octahedra, faces with four equivalent O(1)Sr4LaRu octahedra, and faces with four equivalent O(3)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 0-55°. In the fourth O site, O(4) is bonded to two equivalent Mg(1) and four equivalent La(1) atoms to form distorted OLa4Mg2 octahedra that share corners with two equivalent O(4)La4Mg2 octahedra, corners with four equivalent O(1)Sr4LaRu octahedra, corners with eight equivalent O(2)SrLa4Mg octahedra, edges with two equivalent O(4)La4Mg2 octahedra, faces with four equivalent O(4)La4Mg2 octahedra, and faces with four equivalent O(2)SrLa4Mg octahedra. The corner-sharing octahedral tilt angles range from 0-51°.