Na4Al3Si3HO13 crystallizes in the trigonal R3c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one H(1), one O(1), one O(2), one O(3), and one O(5) atom. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1) and three equivalent O(4) atoms. Al(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form AlO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra. H(1) is bonded in a single-bond geometry to three equivalent Na(1) and one O(1) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(2), three equivalent Na(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Na(2), one Al(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(1) atom.
Na4Al3Si3HO13 crystallizes in the trigonal R3c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one H(1), one O(1), one O(2), one O(3), and one O(5) atom. The Na(1)-H(1) bond length is 2.40 Å. The Na(1)-O(1) bond length is 2.44 Å. The Na(1)-O(2) bond length is 2.39 Å. The Na(1)-O(3) bond length is 2.39 Å. The Na(1)-O(5) bond length is 2.31 Å. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to one O(1) and three equivalent O(4) atoms. The Na(2)-O(1) bond length is 2.44 Å. All Na(2)-O(4) bond lengths are 2.45 Å. Al(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form AlO4 tetrahedra that share corners with four equivalent Si(1)O4 tetrahedra. The Al(1)-O(2) bond length is 1.76 Å. The Al(1)-O(3) bond length is 1.76 Å. The Al(1)-O(4) bond length is 1.76 Å. The Al(1)-O(5) bond length is 1.76 Å. Si(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form SiO4 tetrahedra that share corners with four equivalent Al(1)O4 tetrahedra. The Si(1)-O(2) bond length is 1.64 Å. The Si(1)-O(3) bond length is 1.64 Å. The Si(1)-O(4) bond length is 1.64 Å. The Si(1)-O(5) bond length is 1.64 Å. H(1) is bonded in a single-bond geometry to three equivalent Na(1) and one O(1) atom. The H(1)-O(1) bond length is 0.98 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Na(2), three equivalent Na(1), and one H(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Na(2), one Al(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(1) atom.