Na2Al2Si3H6O13 crystallizes in the monoclinic Cc space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(11), one O(12), one O(13), one O(3), one O(4), one O(5), and one O(7) atom to form distorted NaO7 pentagonal bipyramids that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(1)O4 tetrahedra, and  an edgeedge with one Si(3)O4 tetrahedra. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one O(10), one O(11), and one O(12) atom. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(1)O7 pentagonal bipyramid,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Na(1)O7 pentagonal bipyramid. In the second Al site, Al(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(1)O7 pentagonal bipyramid,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(10), one O(2), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. In the second Si site, Si(2) is bonded to one O(3), one O(6), one O(7), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Na(1)O7 pentagonal bipyramids,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and corners with two equivalent Al(1)O4 tetrahedra. In the third Si site, Si(3) is bonded to one O(10), one O(4), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and  an edgeedge with one Na(1)O7 pentagonal bipyramid. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(11) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(11) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(12) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(12) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(13) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(13) atom. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Al(1) and one Si(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Al(2) and one Si(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Na(1), one Al(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Al(2), and one Si(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Al(2) and one Si(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Si(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Al(2) and one Si(3) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Na(2), one Si(1), and one Si(3) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(1), and one H(2) atom. In the twelfth O site, O(12) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(3), and one H(4) atom. In the thirteenth O site, O(13) is bonded in a distorted water-like geometry to one Na(1), one H(5), and one H(6) atom.
Na2Al2Si3H6O13 crystallizes in the monoclinic Cc space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(11), one O(12), one O(13), one O(3), one O(4), one O(5), and one O(7) atom to form distorted NaO7 pentagonal bipyramids that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra,  an edgeedge with one Al(1)O4 tetrahedra, and  an edgeedge with one Si(3)O4 tetrahedra. The Na(1)-O(11) bond length is 2.36 Å. The Na(1)-O(12) bond length is 2.41 Å. The Na(1)-O(13) bond length is 2.28 Å. The Na(1)-O(3) bond length is 2.71 Å. The Na(1)-O(4) bond length is 2.81 Å. The Na(1)-O(5) bond length is 2.66 Å. The Na(1)-O(7) bond length is 2.67 Å. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one O(10), one O(11), and one O(12) atom. The Na(2)-O(10) bond length is 2.60 Å. The Na(2)-O(11) bond length is 2.32 Å. The Na(2)-O(12) bond length is 2.33 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to one O(1), one O(3), one O(5), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(1)O7 pentagonal bipyramid,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and  an edgeedge with one Na(1)O7 pentagonal bipyramid. The Al(1)-O(1) bond length is 1.79 Å. The Al(1)-O(3) bond length is 1.74 Å. The Al(1)-O(5) bond length is 1.75 Å. The Al(1)-O(7) bond length is 1.77 Å. In the second Al site, Al(2) is bonded to one O(2), one O(4), one O(6), and one O(8) atom to form AlO4 tetrahedra that share  a cornercorner with one Na(1)O7 pentagonal bipyramid,  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent Si(3)O4 tetrahedra. The Al(2)-O(2) bond length is 1.78 Å. The Al(2)-O(4) bond length is 1.76 Å. The Al(2)-O(6) bond length is 1.76 Å. The Al(2)-O(8) bond length is 1.77 Å. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(10), one O(2), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and  a cornercorner with one Si(3)O4 tetrahedra. The Si(1)-O(1) bond length is 1.64 Å. The Si(1)-O(10) bond length is 1.67 Å. The Si(1)-O(2) bond length is 1.62 Å. The Si(1)-O(9) bond length is 1.64 Å. In the second Si site, Si(2) is bonded to one O(3), one O(6), one O(7), and one O(9) atom to form SiO4 tetrahedra that share corners with two equivalent Na(1)O7 pentagonal bipyramids,  a cornercorner with one Al(2)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, and corners with two equivalent Al(1)O4 tetrahedra. The Si(2)-O(3) bond length is 1.63 Å. The Si(2)-O(6) bond length is 1.63 Å. The Si(2)-O(7) bond length is 1.65 Å. The Si(2)-O(9) bond length is 1.67 Å. In the third Si site, Si(3) is bonded to one O(10), one O(4), one O(5), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Al(2)O4 tetrahedra, and  an edgeedge with one Na(1)O7 pentagonal bipyramid. The Si(3)-O(10) bond length is 1.69 Å. The Si(3)-O(4) bond length is 1.61 Å. The Si(3)-O(5) bond length is 1.64 Å. The Si(3)-O(8) bond length is 1.61 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(11) atom. The H(1)-O(11) bond length is 1.00 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(11) atom. The H(2)-O(11) bond length is 0.98 Å. In the third H site, H(3) is bonded in a single-bond geometry to one O(12) atom. The H(3)-O(12) bond length is 0.98 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(12) atom. The H(4)-O(12) bond length is 0.98 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one O(13) atom. The H(5)-O(13) bond length is 0.97 Å. In the sixth H site, H(6) is bonded in a single-bond geometry to one O(13) atom. The H(6)-O(13) bond length is 0.98 Å. There are thirteen inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Al(1) and one Si(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Al(2) and one Si(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Na(1), one Al(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Na(1), one Al(2), and one Si(3) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Al(2) and one Si(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Al(1), and one Si(2) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Al(2) and one Si(3) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Na(2), one Si(1), and one Si(3) atom. In the eleventh O site, O(11) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(1), and one H(2) atom. In the twelfth O site, O(12) is bonded in a distorted water-like geometry to one Na(1), one Na(2), one H(3), and one H(4) atom. In the thirteenth O site, O(13) is bonded in a distorted water-like geometry to one Na(1), one H(5), and one H(6) atom.