The structure described by Na2Al2Si3(HO3)4 crystallizes in the orthorhombic Fdd2 space group. Na(1) is bonded in a 6-coordinate geometry to one H(1), one H(2), one O(4), one O(5), and two equivalent O(6) atoms. Al(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing SiO4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a distorted L-shaped geometry to one Na(1) and one H(2) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one Na(1) and one H(1) atom. There are six inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to one Al(1), one Si(2), and one O(6) atom. In the second 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 third O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(2) atom. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Al(1), and one O(3) atom. In the fifth O site, O(2) is bonded in a bent 150 degrees geometry to one Al(1) and one Si(1) atom. In the sixth O site, O(1) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. is represented by the CIF file [CIF]
data_Na2Al2Si3(HO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.815
_cell_length_b   10.644
_cell_length_c   10.021
_cell_angle_alpha   83.848
_cell_angle_beta   49.997
_cell_angle_gamma   46.155
_symmetry_Int_Tables_number   1
_cell_volume   643.817
_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  0.055  0.054  0.383  1.0
  Na  Na1  1  0.508  0.383  0.054  1.0
  Na  Na2  1  0.196  0.195  0.742  1.0
  Na  Na3  1  0.867  0.742  0.195  1.0
  Al  Al4  1  0.095  0.336  0.210  1.0
  Al  Al5  1  0.359  0.210  0.336  1.0
  Al  Al6  1  0.914  0.155  0.891  1.0
  Al  Al7  1  0.040  0.891  0.155  1.0
  Si  Si8  1  0.597  0.903  0.903  1.0
  Si  Si9  1  0.347  0.653  0.653  1.0
  Si  Si10  1  0.021  0.645  0.410  1.0
  Si  Si11  1  0.925  0.410  0.645  1.0
  Si  Si12  1  0.605  0.229  0.325  1.0
  Si  Si13  1  0.840  0.325  0.229  1.0
  H  H14  1  0.496  0.333  0.830  1.0
  H  H15  1  0.342  0.830  0.333  1.0
  H  H16  1  0.917  0.754  0.908  1.0
  H  H17  1  0.420  0.908  0.754  1.0
  H  H18  1  0.030  0.685  0.839  1.0
  H  H19  1  0.446  0.839  0.685  1.0
  H  H20  1  0.565  0.220  0.804  1.0
  H  H21  1  0.411  0.804  0.220  1.0
  O  O22  1  0.786  0.838  0.672  1.0
  O  O23  1  0.704  0.672  0.838  1.0
  O  O24  1  0.412  0.464  0.546  1.0
  O  O25  1  0.578  0.546  0.464  1.0
  O  O26  1  0.376  0.076  0.991  1.0
  O  O27  1  0.557  0.991  0.076  1.0
  O  O28  1  0.174  0.874  0.693  1.0
  O  O29  1  0.259  0.693  0.874  1.0
  O  O30  1  0.898  0.420  0.246  1.0
  O  O31  1  0.436  0.246  0.420  1.0
  O  O32  1  0.830  0.352  0.814  1.0
  O  O33  1  0.004  0.814  0.352  1.0
  O  O34  1  0.985  0.332  0.446  1.0
  O  O35  1  0.237  0.446  0.332  1.0
  O  O36  1  0.918  0.265  0.013  1.0
  O  O37  1  0.804  0.013  0.265  1.0
  O  O38  1  0.015  0.560  0.292  1.0
  O  O39  1  0.132  0.292  0.560  1.0
  O  O40  1  0.690  0.235  0.118  1.0
  O  O41  1  0.958  0.118  0.235  1.0
  O  O42  1  0.875  0.186  0.732  1.0
  O  O43  1  0.206  0.732  0.186  1.0
  O  O44  1  0.064  0.375  0.044  1.0
  O  O45  1  0.518  0.044  0.375  1.0
[/CIF]
.
The structure described by Na2Al2Si3(HO3)4 crystallizes in the orthorhombic Fdd2 space group. Na(1) is bonded in a 6-coordinate geometry to one H(1), one H(2), one O(4), one O(5), and two equivalent O(6) atoms. Al(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(4), one O(5), and one O(6) atom. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form corner-sharing SiO4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a distorted L-shaped geometry to one Na(1) and one H(2) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one Na(1) and one H(1) atom. There are six inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to one Al(1), one Si(2), and one O(6) atom. In the second 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 third O site, O(5) is bonded in a distorted trigonal planar geometry to one Na(1), one Al(1), and one Si(2) atom. In the fourth O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Al(1), and one O(3) atom. In the fifth O site, O(2) is bonded in a bent 150 degrees geometry to one Al(1) and one Si(1) atom. In the sixth O site, O(1) is bonded in a bent 150 degrees geometry to one Si(1) and one Si(2) atom. is represented by the CIF file [CIF]
data_Na2Al2Si3(HO3)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   13.815
_cell_length_b   10.644
_cell_length_c   10.021
_cell_angle_alpha   83.848
_cell_angle_beta   49.997
_cell_angle_gamma   46.155
_symmetry_Int_Tables_number   1
_cell_volume   643.817
_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  0.055  0.054  0.383  1.0
  Na  Na1  1  0.508  0.383  0.054  1.0
  Na  Na2  1  0.196  0.195  0.742  1.0
  Na  Na3  1  0.867  0.742  0.195  1.0
  Al  Al4  1  0.095  0.336  0.210  1.0
  Al  Al5  1  0.359  0.210  0.336  1.0
  Al  Al6  1  0.914  0.155  0.891  1.0
  Al  Al7  1  0.040  0.891  0.155  1.0
  Si  Si8  1  0.597  0.903  0.903  1.0
  Si  Si9  1  0.347  0.653  0.653  1.0
  Si  Si10  1  0.021  0.645  0.410  1.0
  Si  Si11  1  0.925  0.410  0.645  1.0
  Si  Si12  1  0.605  0.229  0.325  1.0
  Si  Si13  1  0.840  0.325  0.229  1.0
  H  H14  1  0.496  0.333  0.830  1.0
  H  H15  1  0.342  0.830  0.333  1.0
  H  H16  1  0.917  0.754  0.908  1.0
  H  H17  1  0.420  0.908  0.754  1.0
  H  H18  1  0.030  0.685  0.839  1.0
  H  H19  1  0.446  0.839  0.685  1.0
  H  H20  1  0.565  0.220  0.804  1.0
  H  H21  1  0.411  0.804  0.220  1.0
  O  O22  1  0.786  0.838  0.672  1.0
  O  O23  1  0.704  0.672  0.838  1.0
  O  O24  1  0.412  0.464  0.546  1.0
  O  O25  1  0.578  0.546  0.464  1.0
  O  O26  1  0.376  0.076  0.991  1.0
  O  O27  1  0.557  0.991  0.076  1.0
  O  O28  1  0.174  0.874  0.693  1.0
  O  O29  1  0.259  0.693  0.874  1.0
  O  O30  1  0.898  0.420  0.246  1.0
  O  O31  1  0.436  0.246  0.420  1.0
  O  O32  1  0.830  0.352  0.814  1.0
  O  O33  1  0.004  0.814  0.352  1.0
  O  O34  1  0.985  0.332  0.446  1.0
  O  O35  1  0.237  0.446  0.332  1.0
  O  O36  1  0.918  0.265  0.013  1.0
  O  O37  1  0.804  0.013  0.265  1.0
  O  O38  1  0.015  0.560  0.292  1.0
  O  O39  1  0.132  0.292  0.560  1.0
  O  O40  1  0.690  0.235  0.118  1.0
  O  O41  1  0.958  0.118  0.235  1.0
  O  O42  1  0.875  0.186  0.732  1.0
  O  O43  1  0.206  0.732  0.186  1.0
  O  O44  1  0.064  0.375  0.044  1.0
  O  O45  1  0.518  0.044  0.375  1.0
[/CIF]
.