Sr2MgGdRuO6 crystallizes in the monoclinic C2/m space group. Sr(1) is bonded in a 3-coordinate geometry to one O(1) and six equivalent O(2) atoms. Mg(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. Gd(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form GdO6 octahedra that share corners with six equivalent Ru(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-30°. Ru(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form RuO6 octahedra that share corners with six equivalent Gd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-30°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sr(1), one Gd(1), and one Ru(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1), one Mg(1), one Gd(1), and one Ru(1) atom.
Sr2MgGdRuO6 crystallizes in the monoclinic C2/m space group. Sr(1) is bonded in a 3-coordinate geometry to one O(1) and six equivalent O(2) atoms. The Sr(1)-O(1) bond length is 2.49 Å. There are a spread of Sr(1)-O(2) bond distances ranging from 2.59-3.01 Å. Mg(1) is bonded in a square co-planar geometry to four equivalent O(2) atoms. All Mg(1)-O(2) bond lengths are 2.03 Å. Gd(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form GdO6 octahedra that share corners with six equivalent Ru(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-30°. Both Gd(1)-O(1) bond lengths are 2.42 Å. All Gd(1)-O(2) bond lengths are 2.23 Å. Ru(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form RuO6 octahedra that share corners with six equivalent Gd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-30°. Both Ru(1)-O(1) bond lengths are 2.19 Å. All Ru(1)-O(2) bond lengths are 2.09 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Sr(1), one Gd(1), and one Ru(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1), one Mg(1), one Gd(1), and one Ru(1) atom.