Sr6Ru2Fe2O11 crystallizes in the monoclinic C2 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted q6 geometry to one O(1), one O(2), one O(3), one O(4), one O(8), and four equivalent O(7) atoms. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), one O(8), and four equivalent O(6) atoms. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(6), and four equivalent O(5) atoms. Ru(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(5), and one O(7) atom. Fe(1) is bonded to one O(3), one O(4), one O(6), one O(7), and one O(8) atom to form corner-sharing FeO5 square pyramids. There are eight inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(3), and two equivalent Ru(1) atoms to form OSr4Ru2 octahedra that share corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(8)Sr4Fe2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with two equivalent O(6)Sr5Fe octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(5)Sr5Ru octahedra,  an edgeedge with one O(3)Sr4Fe2 octahedra, edges with two equivalent O(2)Sr4Ru2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(5)Sr5Ru octahedra. The corner-sharing octahedral tilt angles range from 4-70°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(3), and two equivalent Ru(1) atoms to form OSr4Ru2 octahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(8)Sr4Fe2 octahedra, corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(6)Sr5Fe octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(5)Sr5Ru octahedra,  an edgeedge with one O(4)Sr4Fe2 octahedra, edges with two equivalent O(1)Sr4Ru2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(5)Sr5Ru octahedra. The corner-sharing octahedral tilt angles range from 4-69°. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms to form OSr4Fe2 octahedra that share corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with two equivalent O(5)Sr5Ru octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(6)Sr5Fe octahedra,  an edgeedge with one O(1)Sr4Ru2 octahedra, edges with two equivalent O(4)Sr4Fe2 octahedra, faces with two equivalent O(8)Sr4Fe2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(6)Sr5Fe octahedra. The corner-sharing octahedral tilt angles range from 5-65°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms to form OSr4Fe2 octahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(5)Sr5Ru octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(6)Sr5Fe octahedra,  an edgeedge with one O(2)Sr4Ru2 octahedra, edges with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(8)Sr4Fe2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(6)Sr5Fe octahedra. The corner-sharing octahedral tilt angles range from 5-64°. In the fifth O site, O(5) is bonded to one Sr(2), four equivalent Sr(3), and one Ru(1) atom to form OSr5Ru octahedra that share  a cornercorner with one O(3)Sr4Fe2 octahedra,  a cornercorner with one O(4)Sr4Fe2 octahedra,  a cornercorner with one O(8)Sr4Fe2 octahedra,  a cornercorner with one O(7)Sr4FeRu octahedra, corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with four equivalent O(5)Sr5Ru octahedra, edges with four equivalent O(6)Sr5Fe octahedra, edges with four equivalent O(5)Sr5Ru octahedra,  a faceface with one O(1)Sr4Ru2 octahedra, and  a faceface with one O(2)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 2-59°. In the sixth O site, O(6) is bonded to one Sr(3), four equivalent Sr(2), and one Fe(1) atom to form distorted OSr5Fe octahedra that share  a cornercorner with one O(7)Sr4FeRu octahedra,  a cornercorner with one O(1)Sr4Ru2 octahedra,  a cornercorner with one O(2)Sr4Ru2 octahedra, corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(8)Sr4Fe2 octahedra, corners with four equivalent O(6)Sr5Fe octahedra, edges with four equivalent O(6)Sr5Fe octahedra, edges with four equivalent O(5)Sr5Ru octahedra,  a faceface with one O(3)Sr4Fe2 octahedra,  a faceface with one O(4)Sr4Fe2 octahedra, and  a faceface with one O(8)Sr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 11-60°. In the seventh O site, O(7) is bonded to four equivalent Sr(1), one Ru(1), and one Fe(1) atom to form distorted OSr4FeRu octahedra that share  a cornercorner with one O(6)Sr5Fe octahedra,  a cornercorner with one O(5)Sr5Ru octahedra, corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(8)Sr4Fe2 octahedra, corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, edges with four equivalent O(7)Sr4FeRu octahedra,  a faceface with one O(3)Sr4Fe2 octahedra,  a faceface with one O(4)Sr4Fe2 octahedra,  a faceface with one O(8)Sr4Fe2 octahedra,  a faceface with one O(1)Sr4Ru2 octahedra, and  a faceface with one O(2)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 2-70°. In the eighth O site, O(8) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms to form distorted OSr4Fe2 octahedra that share corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with two equivalent O(5)Sr5Ru octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(6)Sr5Fe octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(4)Sr4Fe2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(6)Sr5Fe octahedra. The corner-sharing octahedral tilt angles range from 46-57°.
Sr6Ru2Fe2O11 crystallizes in the monoclinic C2 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted q6 geometry to one O(1), one O(2), one O(3), one O(4), one O(8), and four equivalent O(7) atoms. The Sr(1)-O(1) bond length is 2.81 Å. The Sr(1)-O(2) bond length is 2.79 Å. The Sr(1)-O(3) bond length is 2.67 Å. The Sr(1)-O(4) bond length is 2.67 Å. The Sr(1)-O(8) bond length is 2.65 Å. There are a spread of Sr(1)-O(7) bond distances ranging from 2.68-2.86 Å. In the second Sr site, Sr(2) is bonded in a 8-coordinate geometry to one O(3), one O(4), one O(5), one O(8), and four equivalent O(6) atoms. The Sr(2)-O(3) bond length is 2.63 Å. The Sr(2)-O(4) bond length is 2.63 Å. The Sr(2)-O(5) bond length is 2.52 Å. The Sr(2)-O(8) bond length is 2.73 Å. There are two shorter (2.67 Å) and two longer (2.87 Å) Sr(2)-O(6) bond lengths. In the third Sr site, Sr(3) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(6), and four equivalent O(5) atoms. The Sr(3)-O(1) bond length is 2.60 Å. The Sr(3)-O(2) bond length is 2.66 Å. The Sr(3)-O(6) bond length is 2.46 Å. There are a spread of Sr(3)-O(5) bond distances ranging from 2.72-2.80 Å. Ru(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(5), and one O(7) atom. The Ru(1)-O(1) bond length is 2.03 Å. The Ru(1)-O(2) bond length is 2.01 Å. The Ru(1)-O(5) bond length is 2.01 Å. The Ru(1)-O(7) bond length is 1.97 Å. Fe(1) is bonded to one O(3), one O(4), one O(6), one O(7), and one O(8) atom to form corner-sharing FeO5 square pyramids. The Fe(1)-O(3) bond length is 2.02 Å. The Fe(1)-O(4) bond length is 2.02 Å. The Fe(1)-O(6) bond length is 2.00 Å. The Fe(1)-O(7) bond length is 2.10 Å. The Fe(1)-O(8) bond length is 1.91 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1), two equivalent Sr(3), and two equivalent Ru(1) atoms to form OSr4Ru2 octahedra that share corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(8)Sr4Fe2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with two equivalent O(6)Sr5Fe octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(5)Sr5Ru octahedra,  an edgeedge with one O(3)Sr4Fe2 octahedra, edges with two equivalent O(2)Sr4Ru2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(5)Sr5Ru octahedra. The corner-sharing octahedral tilt angles range from 4-70°. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Sr(3), and two equivalent Ru(1) atoms to form OSr4Ru2 octahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(8)Sr4Fe2 octahedra, corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(6)Sr5Fe octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(5)Sr5Ru octahedra,  an edgeedge with one O(4)Sr4Fe2 octahedra, edges with two equivalent O(1)Sr4Ru2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(5)Sr5Ru octahedra. The corner-sharing octahedral tilt angles range from 4-69°. In the third O site, O(3) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms to form OSr4Fe2 octahedra that share corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with two equivalent O(5)Sr5Ru octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(6)Sr5Fe octahedra,  an edgeedge with one O(1)Sr4Ru2 octahedra, edges with two equivalent O(4)Sr4Fe2 octahedra, faces with two equivalent O(8)Sr4Fe2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(6)Sr5Fe octahedra. The corner-sharing octahedral tilt angles range from 5-65°. In the fourth O site, O(4) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms to form OSr4Fe2 octahedra that share corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(5)Sr5Ru octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(6)Sr5Fe octahedra,  an edgeedge with one O(2)Sr4Ru2 octahedra, edges with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(8)Sr4Fe2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(6)Sr5Fe octahedra. The corner-sharing octahedral tilt angles range from 5-64°. In the fifth O site, O(5) is bonded to one Sr(2), four equivalent Sr(3), and one Ru(1) atom to form OSr5Ru octahedra that share  a cornercorner with one O(3)Sr4Fe2 octahedra,  a cornercorner with one O(4)Sr4Fe2 octahedra,  a cornercorner with one O(8)Sr4Fe2 octahedra,  a cornercorner with one O(7)Sr4FeRu octahedra, corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with four equivalent O(5)Sr5Ru octahedra, edges with four equivalent O(6)Sr5Fe octahedra, edges with four equivalent O(5)Sr5Ru octahedra,  a faceface with one O(1)Sr4Ru2 octahedra, and  a faceface with one O(2)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 2-59°. In the sixth O site, O(6) is bonded to one Sr(3), four equivalent Sr(2), and one Fe(1) atom to form distorted OSr5Fe octahedra that share  a cornercorner with one O(7)Sr4FeRu octahedra,  a cornercorner with one O(1)Sr4Ru2 octahedra,  a cornercorner with one O(2)Sr4Ru2 octahedra, corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(8)Sr4Fe2 octahedra, corners with four equivalent O(6)Sr5Fe octahedra, edges with four equivalent O(6)Sr5Fe octahedra, edges with four equivalent O(5)Sr5Ru octahedra,  a faceface with one O(3)Sr4Fe2 octahedra,  a faceface with one O(4)Sr4Fe2 octahedra, and  a faceface with one O(8)Sr4Fe2 octahedra. The corner-sharing octahedral tilt angles range from 11-60°. In the seventh O site, O(7) is bonded to four equivalent Sr(1), one Ru(1), and one Fe(1) atom to form distorted OSr4FeRu octahedra that share  a cornercorner with one O(6)Sr5Fe octahedra,  a cornercorner with one O(5)Sr5Ru octahedra, corners with two equivalent O(3)Sr4Fe2 octahedra, corners with two equivalent O(4)Sr4Fe2 octahedra, corners with two equivalent O(8)Sr4Fe2 octahedra, corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, edges with four equivalent O(7)Sr4FeRu octahedra,  a faceface with one O(3)Sr4Fe2 octahedra,  a faceface with one O(4)Sr4Fe2 octahedra,  a faceface with one O(8)Sr4Fe2 octahedra,  a faceface with one O(1)Sr4Ru2 octahedra, and  a faceface with one O(2)Sr4Ru2 octahedra. The corner-sharing octahedral tilt angles range from 2-70°. In the eighth O site, O(8) is bonded to two equivalent Sr(1), two equivalent Sr(2), and two equivalent Fe(1) atoms to form distorted OSr4Fe2 octahedra that share corners with two equivalent O(1)Sr4Ru2 octahedra, corners with two equivalent O(2)Sr4Ru2 octahedra, corners with two equivalent O(5)Sr5Ru octahedra, corners with four equivalent O(7)Sr4FeRu octahedra, corners with four equivalent O(6)Sr5Fe octahedra, faces with two equivalent O(3)Sr4Fe2 octahedra, faces with two equivalent O(4)Sr4Fe2 octahedra, faces with two equivalent O(7)Sr4FeRu octahedra, and faces with two equivalent O(6)Sr5Fe octahedra. The corner-sharing octahedral tilt angles range from 46-57°.