Sr6Mg2La4Ru3O20 crystallizes in the triclinic P-1 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(10), one O(5), and two equivalent O(4) atoms to form distorted SrO4 tetrahedra that share corners with two equivalent Ru(1)O6 octahedra and corners with three equivalent Sr(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-64°. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(2), one O(4), two equivalent O(1), and two equivalent O(5) atoms. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one O(11), one O(7), one O(8), and two equivalent O(6) atoms. Mg(1) is bonded to one O(3), one O(7), one O(8), and two equivalent O(11) atoms to form distorted corner-sharing MgO5 trigonal bipyramids. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 5-coordinate geometry to one O(11), two equivalent O(3), and three equivalent O(7) atoms. In the second La site, La(2) is bonded in a 6-coordinate geometry to one O(1), one O(6), two equivalent O(2), and two equivalent O(8) atoms. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(1), one O(2), one O(4), one O(6), and two equivalent O(9) atoms to form RuO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra and corners with two equivalent Sr(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 3°. In the second Ru site, Ru(2) is bonded in a square co-planar geometry to two equivalent O(10) and two equivalent O(5) atoms. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(2), one La(2), and one Ru(1) atom to form OSr2LaRu tetrahedra that share  a cornercorner with one O(2)SrLa2Ru tetrahedra, corners with two equivalent O(1)Sr2LaRu tetrahedra, corners with three equivalent O(4)Sr3Ru tetrahedra, corners with two equivalent O(8)SrLa2Mg trigonal pyramids,  an edgeedge with one O(6)Sr2LaRu tetrahedra, and edges with two equivalent O(2)SrLa2Ru tetrahedra. In the second O site, O(2) is bonded to one Sr(2), two equivalent La(2), and one Ru(1) atom to form OSrLa2Ru tetrahedra that share  a cornercorner with one O(1)Sr2LaRu tetrahedra, corners with two equivalent O(2)SrLa2Ru tetrahedra, corners with three equivalent O(6)Sr2LaRu tetrahedra, corners with two equivalent O(8)SrLa2Mg trigonal pyramids,  an edgeedge with one O(4)Sr3Ru tetrahedra, edges with two equivalent O(1)Sr2LaRu tetrahedra, and  an edgeedge with one O(8)SrLa2Mg trigonal pyramid. In the third O site, O(3) is bonded to two equivalent Mg(1) and four equivalent La(1) atoms to form OLa4Mg2 octahedra that share corners with two equivalent O(8)SrLa2Mg trigonal pyramids and edges with two equivalent O(3)La4Mg2 octahedra. In the fourth O site, O(4) is bonded to one Sr(2), two equivalent Sr(1), and one Ru(1) atom to form OSr3Ru tetrahedra that share  a cornercorner with one O(6)Sr2LaRu tetrahedra, corners with two equivalent O(4)Sr3Ru tetrahedra, corners with three equivalent O(1)Sr2LaRu tetrahedra, and  an edgeedge with one O(2)SrLa2Ru tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(2), and one Ru(2) atom. In the sixth O site, O(6) is bonded to two equivalent Sr(3), one La(2), and one Ru(1) atom to form OSr2LaRu tetrahedra that share  a cornercorner with one O(4)Sr3Ru tetrahedra, corners with two equivalent O(6)Sr2LaRu tetrahedra, corners with three equivalent O(2)SrLa2Ru tetrahedra,  an edgeedge with one O(1)Sr2LaRu tetrahedra, and edges with two equivalent O(8)SrLa2Mg trigonal pyramids. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sr(3), one Mg(1), and three equivalent La(1) atoms. In the eighth O site, O(8) is bonded to one Sr(3), one Mg(1), and two equivalent La(2) atoms to form distorted OSrLa2Mg trigonal pyramids that share  a cornercorner with one O(3)La4Mg2 octahedra, corners with two equivalent O(1)Sr2LaRu tetrahedra, corners with two equivalent O(2)SrLa2Ru tetrahedra, corners with two equivalent O(8)SrLa2Mg trigonal pyramids,  an edgeedge with one O(2)SrLa2Ru tetrahedra, and edges with two equivalent O(6)Sr2LaRu tetrahedra. The corner-sharing octahedral tilt angles are 4°. In the ninth O site, O(9) is bonded in a linear geometry to two equivalent Ru(1) atoms. In the tenth O site, O(10) is bonded in a distorted square co-planar geometry to two equivalent Sr(1) and two equivalent Ru(2) atoms. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(3), two equivalent Mg(1), and one La(1) atom.
Sr6Mg2La4Ru3O20 crystallizes in the triclinic P-1 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to one O(10), one O(5), and two equivalent O(4) atoms to form distorted SrO4 tetrahedra that share corners with two equivalent Ru(1)O6 octahedra and corners with three equivalent Sr(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 58-64°. The Sr(1)-O(10) bond length is 2.51 Å. The Sr(1)-O(5) bond length is 2.33 Å. There is one shorter (2.33 Å) and one longer (2.38 Å) Sr(1)-O(4) bond length. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(2), one O(4), two equivalent O(1), and two equivalent O(5) atoms. The Sr(2)-O(2) bond length is 2.48 Å. The Sr(2)-O(4) bond length is 2.47 Å. There is one shorter (2.43 Å) and one longer (2.48 Å) Sr(2)-O(1) bond length. There is one shorter (2.60 Å) and one longer (2.88 Å) Sr(2)-O(5) bond length. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one O(11), one O(7), one O(8), and two equivalent O(6) atoms. The Sr(3)-O(11) bond length is 2.75 Å. The Sr(3)-O(7) bond length is 2.79 Å. The Sr(3)-O(8) bond length is 2.38 Å. There is one shorter (2.33 Å) and one longer (2.37 Å) Sr(3)-O(6) bond length. Mg(1) is bonded to one O(3), one O(7), one O(8), and two equivalent O(11) atoms to form distorted corner-sharing MgO5 trigonal bipyramids. The Mg(1)-O(3) bond length is 2.42 Å. The Mg(1)-O(7) bond length is 2.06 Å. The Mg(1)-O(8) bond length is 1.92 Å. There is one shorter (2.14 Å) and one longer (2.20 Å) Mg(1)-O(11) bond length. There are two inequivalent La sites. In the first La site, La(1) is bonded in a 5-coordinate geometry to one O(11), two equivalent O(3), and three equivalent O(7) atoms. The La(1)-O(11) bond length is 2.25 Å. There is one shorter (2.41 Å) and one longer (2.60 Å) La(1)-O(3) bond length. There are a spread of La(1)-O(7) bond distances ranging from 2.24-3.18 Å. In the second La site, La(2) is bonded in a 6-coordinate geometry to one O(1), one O(6), two equivalent O(2), and two equivalent O(8) atoms. The La(2)-O(1) bond length is 2.35 Å. The La(2)-O(6) bond length is 2.42 Å. There is one shorter (2.38 Å) and one longer (2.47 Å) La(2)-O(2) bond length. There is one shorter (2.45 Å) and one longer (2.50 Å) La(2)-O(8) bond length. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(1), one O(2), one O(4), one O(6), and two equivalent O(9) atoms to form RuO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra and corners with two equivalent Sr(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 3°. The Ru(1)-O(1) bond length is 2.00 Å. The Ru(1)-O(2) bond length is 1.96 Å. The Ru(1)-O(4) bond length is 1.97 Å. The Ru(1)-O(6) bond length is 2.08 Å. Both Ru(1)-O(9) bond lengths are 1.98 Å. In the second Ru site, Ru(2) is bonded in a square co-planar geometry to two equivalent O(10) and two equivalent O(5) atoms. Both Ru(2)-O(10) bond lengths are 1.98 Å. Both Ru(2)-O(5) bond lengths are 1.92 Å. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(2), one La(2), and one Ru(1) atom to form OSr2LaRu tetrahedra that share  a cornercorner with one O(2)SrLa2Ru tetrahedra, corners with two equivalent O(1)Sr2LaRu tetrahedra, corners with three equivalent O(4)Sr3Ru tetrahedra, corners with two equivalent O(8)SrLa2Mg trigonal pyramids,  an edgeedge with one O(6)Sr2LaRu tetrahedra, and edges with two equivalent O(2)SrLa2Ru tetrahedra. In the second O site, O(2) is bonded to one Sr(2), two equivalent La(2), and one Ru(1) atom to form OSrLa2Ru tetrahedra that share  a cornercorner with one O(1)Sr2LaRu tetrahedra, corners with two equivalent O(2)SrLa2Ru tetrahedra, corners with three equivalent O(6)Sr2LaRu tetrahedra, corners with two equivalent O(8)SrLa2Mg trigonal pyramids,  an edgeedge with one O(4)Sr3Ru tetrahedra, edges with two equivalent O(1)Sr2LaRu tetrahedra, and  an edgeedge with one O(8)SrLa2Mg trigonal pyramid. In the third O site, O(3) is bonded to two equivalent Mg(1) and four equivalent La(1) atoms to form OLa4Mg2 octahedra that share corners with two equivalent O(8)SrLa2Mg trigonal pyramids and edges with two equivalent O(3)La4Mg2 octahedra. In the fourth O site, O(4) is bonded to one Sr(2), two equivalent Sr(1), and one Ru(1) atom to form OSr3Ru tetrahedra that share  a cornercorner with one O(6)Sr2LaRu tetrahedra, corners with two equivalent O(4)Sr3Ru tetrahedra, corners with three equivalent O(1)Sr2LaRu tetrahedra, and  an edgeedge with one O(2)SrLa2Ru tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Sr(2), and one Ru(2) atom. In the sixth O site, O(6) is bonded to two equivalent Sr(3), one La(2), and one Ru(1) atom to form OSr2LaRu tetrahedra that share  a cornercorner with one O(4)Sr3Ru tetrahedra, corners with two equivalent O(6)Sr2LaRu tetrahedra, corners with three equivalent O(2)SrLa2Ru tetrahedra,  an edgeedge with one O(1)Sr2LaRu tetrahedra, and edges with two equivalent O(8)SrLa2Mg trigonal pyramids. In the seventh O site, O(7) is bonded in a 5-coordinate geometry to one Sr(3), one Mg(1), and three equivalent La(1) atoms. In the eighth O site, O(8) is bonded to one Sr(3), one Mg(1), and two equivalent La(2) atoms to form distorted OSrLa2Mg trigonal pyramids that share  a cornercorner with one O(3)La4Mg2 octahedra, corners with two equivalent O(1)Sr2LaRu tetrahedra, corners with two equivalent O(2)SrLa2Ru tetrahedra, corners with two equivalent O(8)SrLa2Mg trigonal pyramids,  an edgeedge with one O(2)SrLa2Ru tetrahedra, and edges with two equivalent O(6)Sr2LaRu tetrahedra. The corner-sharing octahedral tilt angles are 4°. In the ninth O site, O(9) is bonded in a linear geometry to two equivalent Ru(1) atoms. In the tenth O site, O(10) is bonded in a distorted square co-planar geometry to two equivalent Sr(1) and two equivalent Ru(2) atoms. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(3), two equivalent Mg(1), and one La(1) atom.