The crystal structure described by Na2AlSi3HO9 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(6), one O(7), and two equivalent O(8) atoms. In the second Na site, Na(2) is bonded to one O(1), one O(3), one O(5), and two equivalent O(2) atoms to form distorted NaO5 trigonal bipyramids that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Al(1)O4 tetrahedra, and  an edgeedge with one Na(2)O5 trigonal bipyramid. Al(1) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Na(2)O5 trigonal bipyramid. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(6), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Na(2)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(6), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Na(2)O5 trigonal bipyramids. In the third Si site, Si(3) is bonded to one O(3), one O(5), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Na(2)O5 trigonal bipyramids. H(1) is bonded in a linear geometry to one O(2) and one O(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Al(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2), one Si(2), and one H(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(2), one Si(1), and one Si(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(2), one Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), 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(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Si(3), and one H(1) 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. is represented by the CIF card [CIF]
data_Na2AlSi3HO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.271
_cell_length_b   7.345
_cell_length_c   8.793
_cell_angle_alpha   80.422
_cell_angle_beta   79.148
_cell_angle_gamma   64.455
_symmetry_Int_Tables_number   1
_cell_volume   414.166
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Na  Na0  1  0.612  0.215  0.056  1.0
  Na  Na1  1  0.388  0.785  0.944  1.0
  Na  Na2  1  0.761  0.413  0.442  1.0
  Na  Na3  1  0.239  0.587  0.558  1.0
  Al  Al4  1  0.953  0.804  0.853  1.0
  Al  Al5  1  0.047  0.196  0.147  1.0
  Si  Si6  1  0.806  0.947  0.362  1.0
  Si  Si7  1  0.194  0.053  0.638  1.0
  Si  Si8  1  0.585  0.096  0.693  1.0
  Si  Si9  1  0.415  0.904  0.307  1.0
  Si  Si10  1  0.898  0.401  0.814  1.0
  Si  Si11  1  0.102  0.599  0.186  1.0
  H  H12  1  0.590  0.430  0.752  1.0
  H  H13  1  0.410  0.570  0.248  1.0
  O  O14  1  0.863  0.133  0.281  1.0
  O  O15  1  0.137  0.867  0.719  1.0
  O  O16  1  0.527  0.334  0.652  1.0
  O  O17  1  0.473  0.666  0.348  1.0
  O  O18  1  0.001  0.723  0.346  1.0
  O  O19  1  0.999  0.277  0.654  1.0
  O  O20  1  0.702  0.997  0.849  1.0
  O  O21  1  0.298  0.003  0.151  1.0
  O  O22  1  0.978  0.578  0.794  1.0
  O  O23  1  0.022  0.422  0.206  1.0
  O  O24  1  0.619  0.959  0.276  1.0
  O  O25  1  0.381  0.041  0.724  1.0
  O  O26  1  0.966  0.237  0.964  1.0
  O  O27  1  0.034  0.763  0.036  1.0
  O  O28  1  0.645  0.495  0.823  1.0
  O  O29  1  0.355  0.505  0.177  1.0
  O  O30  1  0.738  0.962  0.548  1.0
  O  O31  1  0.262  0.038  0.452  1.0
[/CIF]
.
The crystal structure described by Na2AlSi3HO9 crystallizes in the triclinic P-1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one O(1), one O(4), one O(6), one O(7), and two equivalent O(8) atoms. In the second Na site, Na(2) is bonded to one O(1), one O(3), one O(5), and two equivalent O(2) atoms to form distorted NaO5 trigonal bipyramids that share corners with two equivalent Si(1)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra,  an edgeedge with one Al(1)O4 tetrahedra, and  an edgeedge with one Na(2)O5 trigonal bipyramid. Al(1) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form AlO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, corners with two equivalent Si(3)O4 tetrahedra, and  an edgeedge with one Na(2)O5 trigonal bipyramid. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(3), one O(6), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Si(3)O4 tetrahedra, corners with two equivalent Si(2)O4 tetrahedra, and corners with two equivalent Na(2)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(2), one O(4), one O(6), and one O(9) atom to form SiO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra, corners with two equivalent Si(1)O4 tetrahedra, and corners with two equivalent Na(2)O5 trigonal bipyramids. In the third Si site, Si(3) is bonded to one O(3), one O(5), one O(7), and one O(8) atom to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra, corners with two equivalent Al(1)O4 tetrahedra, and corners with two equivalent Na(2)O5 trigonal bipyramids. H(1) is bonded in a linear geometry to one O(2) and one O(8) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Al(1), and one Si(1) atom. In the second O site, O(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Na(2), one Si(2), and one H(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Na(2), one Si(1), and one Si(3) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(2), one Al(1), and one Si(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(1), one Si(1), 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(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Si(3), and one H(1) 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. is represented by the CIF card [CIF]
data_Na2AlSi3HO9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.271
_cell_length_b   7.345
_cell_length_c   8.793
_cell_angle_alpha   80.422
_cell_angle_beta   79.148
_cell_angle_gamma   64.455
_symmetry_Int_Tables_number   1
_cell_volume   414.166
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Na  Na0  1  0.612  0.215  0.056  1.0
  Na  Na1  1  0.388  0.785  0.944  1.0
  Na  Na2  1  0.761  0.413  0.442  1.0
  Na  Na3  1  0.239  0.587  0.558  1.0
  Al  Al4  1  0.953  0.804  0.853  1.0
  Al  Al5  1  0.047  0.196  0.147  1.0
  Si  Si6  1  0.806  0.947  0.362  1.0
  Si  Si7  1  0.194  0.053  0.638  1.0
  Si  Si8  1  0.585  0.096  0.693  1.0
  Si  Si9  1  0.415  0.904  0.307  1.0
  Si  Si10  1  0.898  0.401  0.814  1.0
  Si  Si11  1  0.102  0.599  0.186  1.0
  H  H12  1  0.590  0.430  0.752  1.0
  H  H13  1  0.410  0.570  0.248  1.0
  O  O14  1  0.863  0.133  0.281  1.0
  O  O15  1  0.137  0.867  0.719  1.0
  O  O16  1  0.527  0.334  0.652  1.0
  O  O17  1  0.473  0.666  0.348  1.0
  O  O18  1  0.001  0.723  0.346  1.0
  O  O19  1  0.999  0.277  0.654  1.0
  O  O20  1  0.702  0.997  0.849  1.0
  O  O21  1  0.298  0.003  0.151  1.0
  O  O22  1  0.978  0.578  0.794  1.0
  O  O23  1  0.022  0.422  0.206  1.0
  O  O24  1  0.619  0.959  0.276  1.0
  O  O25  1  0.381  0.041  0.724  1.0
  O  O26  1  0.966  0.237  0.964  1.0
  O  O27  1  0.034  0.763  0.036  1.0
  O  O28  1  0.645  0.495  0.823  1.0
  O  O29  1  0.355  0.505  0.177  1.0
  O  O30  1  0.738  0.962  0.548  1.0
  O  O31  1  0.262  0.038  0.452  1.0
[/CIF]
.