MgAg4(RuO3)4 crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded to two equivalent Ag(1) and two equivalent Ag(2) atoms to form MgAg4 tetrahedra that share  an edgeedge with one O(3)Ag2Ru2 tetrahedra,  an edgeedge with one O(4)Ag2Ru2 tetrahedra, and edges with four equivalent O(1)Ag2Ru2 tetrahedra. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(3), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedral tilt angles range from 44-45°. In the second Ru site, Ru(2) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedral tilt angles range from 44-46°. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 7-coordinate geometry to one Mg(1), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. In the second Ag site, Ag(2) is bonded in a 7-coordinate geometry to one Mg(1), one O(3), one O(6), two equivalent O(1), and two equivalent O(2) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Ru(1), one Ru(2), one Ag(1), and one Ag(2) atom to form distorted OAg2Ru2 tetrahedra that share corners with two equivalent O(3)Ag2Ru2 tetrahedra, corners with two equivalent O(4)Ag2Ru2 tetrahedra, corners with four equivalent O(1)Ag2Ru2 tetrahedra, and  an edgeedge with one Mg(1)Ag4 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ru(1), one Ru(2), one Ag(1), and one Ag(2) atom. In the third O site, O(3) is bonded to two equivalent Ru(1) and two equivalent Ag(2) atoms to form distorted OAg2Ru2 tetrahedra that share corners with eight equivalent O(1)Ag2Ru2 tetrahedra and  an edgeedge with one Mg(1)Ag4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Ru(2) and two equivalent Ag(1) atoms to form distorted OAg2Ru2 tetrahedra that share corners with eight equivalent O(1)Ag2Ru2 tetrahedra and  an edgeedge with one Mg(1)Ag4 tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ru(2) and two equivalent Ag(1) atoms. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Ru(1) and two equivalent Ag(2) atoms.
MgAg4(RuO3)4 crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded to two equivalent Ag(1) and two equivalent Ag(2) atoms to form MgAg4 tetrahedra that share  an edgeedge with one O(3)Ag2Ru2 tetrahedra,  an edgeedge with one O(4)Ag2Ru2 tetrahedra, and edges with four equivalent O(1)Ag2Ru2 tetrahedra. Both Mg(1)-Ag(1) bond lengths are 2.67 Å. Both Mg(1)-Ag(2) bond lengths are 2.69 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded to one O(3), one O(6), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedral tilt angles range from 44-45°. The Ru(1)-O(3) bond length is 1.96 Å. The Ru(1)-O(6) bond length is 1.96 Å. Both Ru(1)-O(1) bond lengths are 1.96 Å. Both Ru(1)-O(2) bond lengths are 1.95 Å. In the second Ru site, Ru(2) is bonded to one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing RuO6 octahedra. The corner-sharing octahedral tilt angles range from 44-46°. The Ru(2)-O(4) bond length is 1.96 Å. The Ru(2)-O(5) bond length is 1.95 Å. Both Ru(2)-O(1) bond lengths are 1.96 Å. Both Ru(2)-O(2) bond lengths are 1.95 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a 7-coordinate geometry to one Mg(1), one O(4), one O(5), two equivalent O(1), and two equivalent O(2) atoms. The Ag(1)-O(4) bond length is 2.67 Å. The Ag(1)-O(5) bond length is 2.54 Å. Both Ag(1)-O(1) bond lengths are 2.68 Å. Both Ag(1)-O(2) bond lengths are 2.54 Å. In the second Ag site, Ag(2) is bonded in a 7-coordinate geometry to one Mg(1), one O(3), one O(6), two equivalent O(1), and two equivalent O(2) atoms. The Ag(2)-O(3) bond length is 2.67 Å. The Ag(2)-O(6) bond length is 2.54 Å. Both Ag(2)-O(1) bond lengths are 2.67 Å. Both Ag(2)-O(2) bond lengths are 2.54 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded to one Ru(1), one Ru(2), one Ag(1), and one Ag(2) atom to form distorted OAg2Ru2 tetrahedra that share corners with two equivalent O(3)Ag2Ru2 tetrahedra, corners with two equivalent O(4)Ag2Ru2 tetrahedra, corners with four equivalent O(1)Ag2Ru2 tetrahedra, and  an edgeedge with one Mg(1)Ag4 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ru(1), one Ru(2), one Ag(1), and one Ag(2) atom. In the third O site, O(3) is bonded to two equivalent Ru(1) and two equivalent Ag(2) atoms to form distorted OAg2Ru2 tetrahedra that share corners with eight equivalent O(1)Ag2Ru2 tetrahedra and  an edgeedge with one Mg(1)Ag4 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Ru(2) and two equivalent Ag(1) atoms to form distorted OAg2Ru2 tetrahedra that share corners with eight equivalent O(1)Ag2Ru2 tetrahedra and  an edgeedge with one Mg(1)Ag4 tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Ru(2) and two equivalent Ag(1) atoms. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Ru(1) and two equivalent Ag(2) atoms.