MgAgCu2(SO5)2 crystallizes in the monoclinic C2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form distorted MgO6 pentagonal pyramids that share edges with two equivalent S(1)O4 tetrahedra. Ag(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(3) and two equivalent O(4) atoms. Cu(1) is bonded in a 4-coordinate geometry to one O(1), one O(4), and two equivalent O(5) atoms. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share  an edgeedge with one Mg(1)O6 pentagonal pyramid. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Cu(1), and one S(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one S(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Ag(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ag(1), one Cu(1), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1) and two equivalent Cu(1) atoms.
MgAgCu2(SO5)2 crystallizes in the monoclinic C2 space group. Mg(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form distorted MgO6 pentagonal pyramids that share edges with two equivalent S(1)O4 tetrahedra. Both Mg(1)-O(1) bond lengths are 2.24 Å. Both Mg(1)-O(3) bond lengths are 2.17 Å. Both Mg(1)-O(5) bond lengths are 2.00 Å. Ag(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(3) and two equivalent O(4) atoms. Both Ag(1)-O(3) bond lengths are 2.44 Å. Both Ag(1)-O(4) bond lengths are 2.47 Å. Cu(1) is bonded in a 4-coordinate geometry to one O(1), one O(4), and two equivalent O(5) atoms. The Cu(1)-O(1) bond length is 2.29 Å. The Cu(1)-O(4) bond length is 2.03 Å. There is one shorter (1.80 Å) and one longer (1.82 Å) Cu(1)-O(5) bond length. S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share  an edgeedge with one Mg(1)O6 pentagonal pyramid. The S(1)-O(1) bond length is 1.52 Å. The S(1)-O(2) bond length is 1.44 Å. The S(1)-O(3) bond length is 1.52 Å. The S(1)-O(4) bond length is 1.53 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one Cu(1), and one S(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one S(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Ag(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ag(1), one Cu(1), and one S(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal non-coplanar geometry to one Mg(1) and two equivalent Cu(1) atoms.