NaMgSO7 crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(5) atoms. Mg(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form distorted MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra and corners with two equivalent S(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. S(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 50°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Mg(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 bent 150 degrees geometry to one Na(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Na(1) and two equivalent Mg(1) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Mg(1), and one O(5) atom.
NaMgSO7 crystallizes in the monoclinic P2_1/m space group. Na(1) is bonded in a 6-coordinate geometry to one O(3), one O(4), two equivalent O(1), and two equivalent O(5) atoms. The Na(1)-O(3) bond length is 2.25 Å. The Na(1)-O(4) bond length is 2.30 Å. Both Na(1)-O(1) bond lengths are 2.55 Å. Both Na(1)-O(5) bond lengths are 2.73 Å. Mg(1) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form distorted MgO6 octahedra that share corners with two equivalent Mg(1)O6 octahedra and corners with two equivalent S(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 49°. Both Mg(1)-O(1) bond lengths are 2.07 Å. Both Mg(1)-O(4) bond lengths are 1.98 Å. Both Mg(1)-O(5) bond lengths are 2.51 Å. S(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form SO4 tetrahedra that share corners with two equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles are 50°. The S(1)-O(2) bond length is 1.46 Å. The S(1)-O(3) bond length is 1.48 Å. Both S(1)-O(1) bond lengths are 1.52 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Mg(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 bent 150 degrees geometry to one Na(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a trigonal non-coplanar geometry to one Na(1) and two equivalent Mg(1) atoms. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Mg(1), and one O(5) atom. The O(5)-O(5) bond length is 1.25 Å.