Sr2MgRu3O10 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(5), and one O(7) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Ru(1)O6 octahedra, corners with two equivalent Ru(2)O6 octahedra,  an edgeedge with one Ru(1)O6 octahedra,  an edgeedge with one Ru(2)O6 octahedra, and  an edgeedge with one Ru(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-60°. There are three inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form RuO6 octahedra that share corners with two equivalent Ru(3)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, edges with two equivalent Ru(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 47-51°. In the second Ru site, Ru(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form RuO6 octahedra that share corners with two equivalent Ru(3)O6 octahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, edges with two equivalent Ru(1)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 50-54°. In the third Ru site, Ru(3) is bonded to one O(10), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form RuO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra, corners with two equivalent Ru(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 47-54°. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Mg(1), one Ru(1), and one Ru(2) atom. In the second O site, O(2) is bonded to one Sr(2), one Mg(1), one Ru(1), and one Ru(2) atom to form distorted edge-sharing OSrMgRu2 tetrahedra. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one Ru(1), and one Ru(2) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Ru(1) and one Ru(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one Ru(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Sr(2), one Ru(2), and one Ru(3) atom. In the seventh O site, O(7) is bonded to one Sr(1), one Mg(1), one Ru(2), and one Ru(3) atom to form edge-sharing OSrMgRu2 trigonal pyramids. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Sr(1), one Sr(2), one Ru(1), and one Ru(3) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Sr(2), one Ru(1), and one Ru(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Ru(3) atom.
Sr2MgRu3O10 crystallizes in the triclinic P1 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. The Sr(1)-O(1) bond length is 2.93 Å. The Sr(1)-O(10) bond length is 2.39 Å. The Sr(1)-O(5) bond length is 2.53 Å. The Sr(1)-O(6) bond length is 2.52 Å. The Sr(1)-O(7) bond length is 2.53 Å. The Sr(1)-O(8) bond length is 2.54 Å. The Sr(1)-O(9) bond length is 2.79 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(5), one O(6), one O(8), and one O(9) atom. The Sr(2)-O(10) bond length is 2.57 Å. The Sr(2)-O(2) bond length is 2.50 Å. The Sr(2)-O(5) bond length is 2.45 Å. The Sr(2)-O(6) bond length is 2.64 Å. The Sr(2)-O(8) bond length is 2.69 Å. The Sr(2)-O(9) bond length is 2.55 Å. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(5), and one O(7) atom to form MgO5 trigonal bipyramids that share  a cornercorner with one Ru(1)O6 octahedra, corners with two equivalent Ru(2)O6 octahedra,  an edgeedge with one Ru(1)O6 octahedra,  an edgeedge with one Ru(2)O6 octahedra, and  an edgeedge with one Ru(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 9-60°. The Mg(1)-O(1) bond length is 2.16 Å. The Mg(1)-O(2) bond length is 2.02 Å. The Mg(1)-O(3) bond length is 2.03 Å. The Mg(1)-O(5) bond length is 1.95 Å. The Mg(1)-O(7) bond length is 2.18 Å. There are three inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(8), and one O(9) atom to form RuO6 octahedra that share corners with two equivalent Ru(3)O6 octahedra,  a cornercorner with one Mg(1)O5 trigonal bipyramid, edges with two equivalent Ru(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 47-51°. The Ru(1)-O(1) bond length is 1.99 Å. The Ru(1)-O(2) bond length is 2.03 Å. The Ru(1)-O(3) bond length is 2.07 Å. The Ru(1)-O(4) bond length is 1.92 Å. The Ru(1)-O(8) bond length is 2.04 Å. The Ru(1)-O(9) bond length is 2.00 Å. In the second Ru site, Ru(2) is bonded to one O(1), one O(2), one O(3), one O(4), one O(6), and one O(7) atom to form RuO6 octahedra that share corners with two equivalent Ru(3)O6 octahedra, corners with two equivalent Mg(1)O5 trigonal bipyramids, edges with two equivalent Ru(1)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 50-54°. The Ru(2)-O(1) bond length is 2.03 Å. The Ru(2)-O(2) bond length is 2.05 Å. The Ru(2)-O(3) bond length is 2.00 Å. The Ru(2)-O(4) bond length is 1.98 Å. The Ru(2)-O(6) bond length is 2.00 Å. The Ru(2)-O(7) bond length is 2.03 Å. In the third Ru site, Ru(3) is bonded to one O(10), one O(5), one O(6), one O(7), one O(8), and one O(9) atom to form RuO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra, corners with two equivalent Ru(2)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 47-54°. The Ru(3)-O(10) bond length is 1.85 Å. The Ru(3)-O(5) bond length is 2.07 Å. The Ru(3)-O(6) bond length is 1.97 Å. The Ru(3)-O(7) bond length is 1.97 Å. The Ru(3)-O(8) bond length is 2.02 Å. The Ru(3)-O(9) bond length is 1.90 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Mg(1), one Ru(1), and one Ru(2) atom. In the second O site, O(2) is bonded to one Sr(2), one Mg(1), one Ru(1), and one Ru(2) atom to form distorted edge-sharing OSrMgRu2 tetrahedra. In the third O site, O(3) is bonded in a distorted T-shaped geometry to one Mg(1), one Ru(1), and one Ru(2) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Ru(1) and one Ru(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one Ru(3) atom. In the sixth O site, O(6) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Sr(2), one Ru(2), and one Ru(3) atom. In the seventh O site, O(7) is bonded to one Sr(1), one Mg(1), one Ru(2), and one Ru(3) atom to form edge-sharing OSrMgRu2 trigonal pyramids. In the eighth O site, O(8) is bonded in a rectangular see-saw-like geometry to one Sr(1), one Sr(2), one Ru(1), and one Ru(3) atom. In the ninth O site, O(9) is bonded in a distorted rectangular see-saw-like geometry to one Sr(1), one Sr(2), one Ru(1), and one Ru(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Ru(3) atom.