NaMg2(SO4)3 crystallizes in the monoclinic C2/c space group. Na(1) is bonded in a distorted hexagonal planar geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form MgO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra and corners with four equivalent S(2)O4 tetrahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent O(2) and two equivalent O(6) atoms to form SO4 tetrahedra that share corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-42°. In the second S site, S(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SO4 tetrahedra that share corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-36°. There are six inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(2) atom. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(2) atom. In the third O site, O(5) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(2) atom. In the fourth O site, O(6) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(1) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(2) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(1) atom.
NaMg2(SO4)3 crystallizes in the monoclinic C2/c space group. Na(1) is bonded in a distorted hexagonal planar geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Na(1)-O(1) bond lengths are 2.56 Å. Both Na(1)-O(2) bond lengths are 2.48 Å. Both Na(1)-O(3) bond lengths are 2.59 Å. Mg(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form MgO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra and corners with four equivalent S(2)O4 tetrahedra. The Mg(1)-O(1) bond length is 2.15 Å. The Mg(1)-O(2) bond length is 2.09 Å. The Mg(1)-O(3) bond length is 2.10 Å. The Mg(1)-O(4) bond length is 2.04 Å. The Mg(1)-O(5) bond length is 2.04 Å. The Mg(1)-O(6) bond length is 2.05 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent O(2) and two equivalent O(6) atoms to form SO4 tetrahedra that share corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-42°. Both S(1)-O(2) bond lengths are 1.50 Å. Both S(1)-O(6) bond lengths are 1.47 Å. In the second S site, S(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form SO4 tetrahedra that share corners with four equivalent Mg(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-36°. The S(2)-O(1) bond length is 1.49 Å. The S(2)-O(3) bond length is 1.49 Å. The S(2)-O(4) bond length is 1.47 Å. The S(2)-O(5) bond length is 1.47 Å. There are six inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(2) atom. In the second O site, O(4) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(2) atom. In the third O site, O(5) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(2) atom. In the fourth O site, O(6) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(1) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(2) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(1) atom.