The material structure described by Na2S2O3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent S(2), two equivalent O(3), and three equivalent O(2) atoms to form a mixture of distorted corner, face, and edge-sharing NaS2O5 pentagonal bipyramids. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent S(2), one O(3), and three equivalent O(1) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a trigonal non-coplanar geometry to one S(2), one O(1), one O(2), and one O(3) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one S(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Na(2) and one S(1) atom to form a mixture of distorted corner and edge-sharing ONa3S tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Na(1) and one S(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(1), and one S(1) atom. is represented by the CIF file [CIF]
data_Na2S2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.242
_cell_length_b   6.522
_cell_length_c   8.621
_cell_angle_alpha   82.663
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   459.631
_cell_formula_units_Z   4
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  0.198  0.876  0.546  1.0
  Na  Na1  1  0.698  0.624  0.454  1.0
  Na  Na2  1  0.621  0.292  0.914  1.0
  Na  Na3  1  0.302  0.376  0.546  1.0
  Na  Na4  1  0.879  0.792  0.914  1.0
  Na  Na5  1  0.379  0.708  0.086  1.0
  Na  Na6  1  0.121  0.208  0.086  1.0
  Na  Na7  1  0.802  0.124  0.454  1.0
  S  S8  1  0.548  0.792  0.734  1.0
  S  S9  1  0.452  0.208  0.266  1.0
  S  S10  1  0.952  0.292  0.734  1.0
  S  S11  1  0.397  0.017  0.787  1.0
  S  S12  1  0.897  0.483  0.213  1.0
  S  S13  1  0.603  0.983  0.213  1.0
  S  S14  1  0.103  0.517  0.787  1.0
  S  S15  1  0.048  0.708  0.266  1.0
  O  O16  1  0.588  0.660  0.884  1.0
  O  O17  1  0.964  0.828  0.378  1.0
  O  O18  1  0.536  0.328  0.378  1.0
  O  O19  1  0.036  0.172  0.622  1.0
  O  O20  1  0.798  0.380  0.662  1.0
  O  O21  1  0.464  0.672  0.622  1.0
  O  O22  1  0.298  0.120  0.338  1.0
  O  O23  1  0.202  0.620  0.338  1.0
  O  O24  1  0.088  0.840  0.116  1.0
  O  O25  1  0.412  0.340  0.116  1.0
  O  O26  1  0.912  0.160  0.884  1.0
  O  O27  1  0.702  0.880  0.662  1.0
[/CIF]
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The material structure described by Na2S2O3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent S(2), two equivalent O(3), and three equivalent O(2) atoms to form a mixture of distorted corner, face, and edge-sharing NaS2O5 pentagonal bipyramids. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent S(2), one O(3), and three equivalent O(1) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a trigonal non-coplanar geometry to one S(2), one O(1), one O(2), and one O(3) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to two equivalent Na(1), two equivalent Na(2), and one S(1) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Na(2) and one S(1) atom to form a mixture of distorted corner and edge-sharing ONa3S tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Na(1) and one S(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(1), and one S(1) atom. is represented by the CIF file [CIF]
data_Na2S2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.242
_cell_length_b   6.522
_cell_length_c   8.621
_cell_angle_alpha   82.663
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   459.631
_cell_formula_units_Z   4
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  0.198  0.876  0.546  1.0
  Na  Na1  1  0.698  0.624  0.454  1.0
  Na  Na2  1  0.621  0.292  0.914  1.0
  Na  Na3  1  0.302  0.376  0.546  1.0
  Na  Na4  1  0.879  0.792  0.914  1.0
  Na  Na5  1  0.379  0.708  0.086  1.0
  Na  Na6  1  0.121  0.208  0.086  1.0
  Na  Na7  1  0.802  0.124  0.454  1.0
  S  S8  1  0.548  0.792  0.734  1.0
  S  S9  1  0.452  0.208  0.266  1.0
  S  S10  1  0.952  0.292  0.734  1.0
  S  S11  1  0.397  0.017  0.787  1.0
  S  S12  1  0.897  0.483  0.213  1.0
  S  S13  1  0.603  0.983  0.213  1.0
  S  S14  1  0.103  0.517  0.787  1.0
  S  S15  1  0.048  0.708  0.266  1.0
  O  O16  1  0.588  0.660  0.884  1.0
  O  O17  1  0.964  0.828  0.378  1.0
  O  O18  1  0.536  0.328  0.378  1.0
  O  O19  1  0.036  0.172  0.622  1.0
  O  O20  1  0.798  0.380  0.662  1.0
  O  O21  1  0.464  0.672  0.622  1.0
  O  O22  1  0.298  0.120  0.338  1.0
  O  O23  1  0.202  0.620  0.338  1.0
  O  O24  1  0.088  0.840  0.116  1.0
  O  O25  1  0.412  0.340  0.116  1.0
  O  O26  1  0.912  0.160  0.884  1.0
  O  O27  1  0.702  0.880  0.662  1.0
[/CIF]
.