NaMgGa(SO4)3 crystallizes in the trigonal R3c space group. Na(1) is bonded in a distorted hexagonal planar geometry to three equivalent O(3) and three equivalent O(4) atoms. Mg(1) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. Ga(1) is bonded to three equivalent O(2) and three equivalent O(4) atoms to form GaO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. 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 corners with two equivalent Mg(1)O6 octahedra and corners with two equivalent Ga(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-38°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ga(1) and one S(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one S(1) atom.
NaMgGa(SO4)3 crystallizes in the trigonal R3c space group. Na(1) is bonded in a distorted hexagonal planar geometry to three equivalent O(3) and three equivalent O(4) atoms. All Na(1)-O(3) bond lengths are 2.54 Å. All Na(1)-O(4) bond lengths are 2.52 Å. Mg(1) is bonded to three equivalent O(1) and three equivalent O(3) atoms to form MgO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. All Mg(1)-O(1) bond lengths are 2.00 Å. All Mg(1)-O(3) bond lengths are 2.06 Å. Ga(1) is bonded to three equivalent O(2) and three equivalent O(4) atoms to form GaO6 octahedra that share corners with six equivalent S(1)O4 tetrahedra. All Ga(1)-O(2) bond lengths are 1.98 Å. All Ga(1)-O(4) bond lengths are 2.03 Å. 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 corners with two equivalent Mg(1)O6 octahedra and corners with two equivalent Ga(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-38°. The S(1)-O(1) bond length is 1.45 Å. The S(1)-O(2) bond length is 1.51 Å. The S(1)-O(3) bond length is 1.47 Å. The S(1)-O(4) bond length is 1.50 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mg(1) and one S(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ga(1) and one S(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Na(1), one Mg(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Na(1), one Ga(1), and one S(1) atom.