Na3Al3Ge3O16 crystallizes in the trigonal R3c space group. Na(1) is bonded in a 3-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms. Al(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AlO4 tetrahedra that share corners with four equivalent Ge(1)O4 tetrahedra. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(5) is bonded in a distorted hexagonal planar geometry to three equivalent Na(1) and three equivalent O(6) atoms. In the second O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one O(5) atom. In the third O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Al(1) and one Ge(1) atom. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom.
Na3Al3Ge3O16 crystallizes in the trigonal R3c space group. Na(1) is bonded in a 3-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and two equivalent O(6) atoms. The Na(1)-O(2) bond length is 2.33 Å. The Na(1)-O(3) bond length is 2.33 Å. The Na(1)-O(4) bond length is 2.30 Å. The Na(1)-O(5) bond length is 2.81 Å. There is one shorter (2.76 Å) and one longer (2.77 Å) Na(1)-O(6) bond length. Al(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AlO4 tetrahedra that share corners with four equivalent Ge(1)O4 tetrahedra. The Al(1)-O(1) bond length is 1.75 Å. The Al(1)-O(2) bond length is 1.77 Å. The Al(1)-O(3) bond length is 1.78 Å. The Al(1)-O(4) bond length is 1.77 Å. Ge(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form GeO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra. The Ge(1)-O(1) bond length is 1.74 Å. The Ge(1)-O(2) bond length is 1.77 Å. The Ge(1)-O(3) bond length is 1.77 Å. The Ge(1)-O(4) bond length is 1.77 Å. There are six inequivalent O sites. In the first O site, O(5) is bonded in a distorted hexagonal planar geometry to three equivalent Na(1) and three equivalent O(6) atoms. All O(5)-O(6) bond lengths are 1.70 Å. In the second O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Na(1) and one O(5) atom. In the third O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Al(1) and one Ge(1) atom. In the fourth O site, O(2) is bonded in a trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the fifth O site, O(3) is bonded in a trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom. In the sixth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Al(1), and one Ge(1) atom.