Sr4MgY2(RuO6)2 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(12), one O(4), one O(5), one O(6), and one O(8) atom. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(3), one O(4), one O(5), one O(8), and one O(9) atom. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(5), one O(7), and one O(9) atom. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(12), one O(2), one O(6), one O(7), one O(8), and one O(9) atom. Mg(1) is bonded to one O(11), one O(12), one O(3), one O(4), and one O(6) atom to form distorted MgO5 trigonal bipyramids that share  an edgeedge with one Ru(2)O6 octahedra,  an edgeedge with one Y(2)O5 trigonal bipyramid, and  a faceface with one Ru(1)O6 octahedra. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(2), one O(4), one O(5), and one O(7) atom. In the second Y site, Y(2) is bonded to one O(1), one O(3), one O(6), one O(8), and one O(9) atom to form distorted YO5 trigonal bipyramids that share corners with two equivalent Ru(2)O6 octahedra, corners with three equivalent Ru(1)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 12-49°. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form RuO6 octahedra that share corners with three equivalent Y(2)O5 trigonal bipyramids and  a faceface with one Mg(1)O5 trigonal bipyramid. In the second Ru site, Ru(2) is bonded to one O(1), one O(10), one O(12), one O(3), one O(5), and one O(7) atom to form RuO6 octahedra that share corners with two equivalent Y(2)O5 trigonal bipyramids and  an edgeedge with one Mg(1)O5 trigonal bipyramid. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Sr(3), one Sr(4), one Y(2), and one Ru(2) atom to form distorted OSr2YRu trigonal pyramids that share corners with two equivalent O(8)Sr3YRu trigonal bipyramids,  an edgeedge with one O(6)Sr2YMgRu trigonal bipyramid, and  an edgeedge with one O(2)Sr2YRu trigonal pyramid. In the second O site, O(2) is bonded to one Sr(3), one Sr(4), one Y(1), and one Ru(1) atom to form distorted OSr2YRu trigonal pyramids that share corners with two equivalent O(6)Sr2YMgRu trigonal bipyramids,  an edgeedge with one O(8)Sr3YRu trigonal bipyramid, and  an edgeedge with one O(1)Sr2YRu trigonal pyramid. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one Mg(1), one Y(2), and one Ru(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), one Y(1), and one Ru(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Y(1), and one Ru(2) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(4), one Mg(1), one Y(2), and one Ru(1) atom to form distorted OSr2YMgRu trigonal bipyramids that share corners with two equivalent O(8)Sr3YRu trigonal bipyramids, corners with two equivalent O(2)Sr2YRu trigonal pyramids,  an edgeedge with one O(8)Sr3YRu trigonal bipyramid, and  an edgeedge with one O(1)Sr2YRu trigonal pyramid. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(3), one Sr(4), one Y(1), and one Ru(2) atom. In the eighth O site, O(8) is bonded to one Sr(1), one Sr(2), one Sr(4), one Y(2), and one Ru(1) atom to form distorted OSr3YRu trigonal bipyramids that share corners with two equivalent O(6)Sr2YMgRu trigonal bipyramids, corners with two equivalent O(1)Sr2YRu trigonal pyramids,  an edgeedge with one O(6)Sr2YMgRu trigonal bipyramid, and  an edgeedge with one O(2)Sr2YRu trigonal pyramid. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one Y(2), and one Ru(1) atom. In the tenth O site, O(10) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Sr(4), one Y(1), and one Ru(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one Ru(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(4), one Mg(1), one Y(1), and one Ru(2) atom.
Sr4MgY2(RuO6)2 crystallizes in the triclinic P1 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 7-coordinate geometry to one O(10), one O(11), one O(12), one O(4), one O(5), one O(6), and one O(8) atom. The Sr(1)-O(10) bond length is 2.92 Å. The Sr(1)-O(11) bond length is 2.59 Å. The Sr(1)-O(12) bond length is 2.72 Å. The Sr(1)-O(4) bond length is 2.72 Å. The Sr(1)-O(5) bond length is 2.51 Å. The Sr(1)-O(6) bond length is 2.67 Å. The Sr(1)-O(8) bond length is 2.62 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(3), one O(4), one O(5), one O(8), and one O(9) atom. The Sr(2)-O(10) bond length is 2.62 Å. The Sr(2)-O(11) bond length is 2.37 Å. The Sr(2)-O(3) bond length is 2.59 Å. The Sr(2)-O(4) bond length is 2.39 Å. The Sr(2)-O(5) bond length is 2.55 Å. The Sr(2)-O(8) bond length is 2.59 Å. The Sr(2)-O(9) bond length is 3.08 Å. In the third Sr site, Sr(3) is bonded in a 5-coordinate geometry to one O(1), one O(10), one O(2), one O(5), one O(7), and one O(9) atom. The Sr(3)-O(1) bond length is 2.49 Å. The Sr(3)-O(10) bond length is 3.08 Å. The Sr(3)-O(2) bond length is 2.50 Å. The Sr(3)-O(5) bond length is 2.59 Å. The Sr(3)-O(7) bond length is 2.50 Å. The Sr(3)-O(9) bond length is 2.64 Å. In the fourth Sr site, Sr(4) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(12), one O(2), one O(6), one O(7), one O(8), and one O(9) atom. The Sr(4)-O(1) bond length is 2.65 Å. The Sr(4)-O(10) bond length is 2.84 Å. The Sr(4)-O(12) bond length is 3.11 Å. The Sr(4)-O(2) bond length is 2.65 Å. The Sr(4)-O(6) bond length is 2.60 Å. The Sr(4)-O(7) bond length is 3.00 Å. The Sr(4)-O(8) bond length is 2.65 Å. The Sr(4)-O(9) bond length is 2.96 Å. Mg(1) is bonded to one O(11), one O(12), one O(3), one O(4), and one O(6) atom to form distorted MgO5 trigonal bipyramids that share  an edgeedge with one Ru(2)O6 octahedra,  an edgeedge with one Y(2)O5 trigonal bipyramid, and  a faceface with one Ru(1)O6 octahedra. The Mg(1)-O(11) bond length is 2.17 Å. The Mg(1)-O(12) bond length is 2.07 Å. The Mg(1)-O(3) bond length is 2.11 Å. The Mg(1)-O(4) bond length is 2.00 Å. The Mg(1)-O(6) bond length is 2.09 Å. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 5-coordinate geometry to one O(10), one O(12), one O(2), one O(4), one O(5), and one O(7) atom. The Y(1)-O(10) bond length is 2.21 Å. The Y(1)-O(12) bond length is 2.22 Å. The Y(1)-O(2) bond length is 2.18 Å. The Y(1)-O(4) bond length is 2.25 Å. The Y(1)-O(5) bond length is 2.89 Å. The Y(1)-O(7) bond length is 2.18 Å. In the second Y site, Y(2) is bonded to one O(1), one O(3), one O(6), one O(8), and one O(9) atom to form distorted YO5 trigonal bipyramids that share corners with two equivalent Ru(2)O6 octahedra, corners with three equivalent Ru(1)O6 octahedra, and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 12-49°. The Y(2)-O(1) bond length is 2.18 Å. The Y(2)-O(3) bond length is 2.24 Å. The Y(2)-O(6) bond length is 2.33 Å. The Y(2)-O(8) bond length is 2.25 Å. The Y(2)-O(9) bond length is 2.14 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(11), one O(2), one O(4), one O(6), one O(8), and one O(9) atom to form RuO6 octahedra that share corners with three equivalent Y(2)O5 trigonal bipyramids and  a faceface with one Mg(1)O5 trigonal bipyramid. The Ru(1)-O(11) bond length is 2.02 Å. The Ru(1)-O(2) bond length is 2.00 Å. The Ru(1)-O(4) bond length is 2.09 Å. The Ru(1)-O(6) bond length is 2.09 Å. The Ru(1)-O(8) bond length is 2.11 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(10), one O(12), one O(3), one O(5), and one O(7) atom to form RuO6 octahedra that share corners with two equivalent Y(2)O5 trigonal bipyramids and  an edgeedge with one Mg(1)O5 trigonal bipyramid. The Ru(2)-O(1) bond length is 2.02 Å. The Ru(2)-O(10) bond length is 2.03 Å. The Ru(2)-O(12) bond length is 2.01 Å. The Ru(2)-O(3) bond length is 2.08 Å. The Ru(2)-O(5) bond length is 2.11 Å. The Ru(2)-O(7) bond length is 2.04 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded to one Sr(3), one Sr(4), one Y(2), and one Ru(2) atom to form distorted OSr2YRu trigonal pyramids that share corners with two equivalent O(8)Sr3YRu trigonal bipyramids,  an edgeedge with one O(6)Sr2YMgRu trigonal bipyramid, and  an edgeedge with one O(2)Sr2YRu trigonal pyramid. In the second O site, O(2) is bonded to one Sr(3), one Sr(4), one Y(1), and one Ru(1) atom to form distorted OSr2YRu trigonal pyramids that share corners with two equivalent O(6)Sr2YMgRu trigonal bipyramids,  an edgeedge with one O(8)Sr3YRu trigonal bipyramid, and  an edgeedge with one O(1)Sr2YRu trigonal pyramid. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one Sr(2), one Mg(1), one Y(2), and one Ru(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), one Y(1), and one Ru(1) atom. In the fifth O site, O(5) is bonded in a 5-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Y(1), and one Ru(2) atom. In the sixth O site, O(6) is bonded to one Sr(1), one Sr(4), one Mg(1), one Y(2), and one Ru(1) atom to form distorted OSr2YMgRu trigonal bipyramids that share corners with two equivalent O(8)Sr3YRu trigonal bipyramids, corners with two equivalent O(2)Sr2YRu trigonal pyramids,  an edgeedge with one O(8)Sr3YRu trigonal bipyramid, and  an edgeedge with one O(1)Sr2YRu trigonal pyramid. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(3), one Sr(4), one Y(1), and one Ru(2) atom. In the eighth O site, O(8) is bonded to one Sr(1), one Sr(2), one Sr(4), one Y(2), and one Ru(1) atom to form distorted OSr3YRu trigonal bipyramids that share corners with two equivalent O(6)Sr2YMgRu trigonal bipyramids, corners with two equivalent O(1)Sr2YRu trigonal pyramids,  an edgeedge with one O(6)Sr2YMgRu trigonal bipyramid, and  an edgeedge with one O(2)Sr2YRu trigonal pyramid. In the ninth O site, O(9) is bonded in a 5-coordinate geometry to one Sr(2), one Sr(3), one Sr(4), one Y(2), and one Ru(1) atom. In the tenth O site, O(10) is bonded in a 6-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), one Sr(4), one Y(1), and one Ru(2) atom. In the eleventh O site, O(11) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Mg(1), and one Ru(1) atom. In the twelfth O site, O(12) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(4), one Mg(1), one Y(1), and one Ru(2) atom.