The structure described by Na2S2O3 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one S(1), one S(3), one O(2), one O(3), one O(6), and one O(8) atom. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one S(5), one S(6), one O(3), one O(6), and one O(9) atom. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one S(4), one S(5), one S(6), one O(3), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one S(1), one S(3), one O(5), and one O(8) atom. In the fifth Na site, Na(5) is bonded in a 6-coordinate geometry to one S(3), one S(5), one S(6), one O(4), one O(7), and one O(9) atom. In the sixth Na site, Na(6) is bonded in a 5-coordinate geometry to one S(1), one S(3), one O(5), one O(6), and one O(8) atom. There are six inequivalent S sites. In the first S site, S(1) is bonded to one Na(1), one Na(4), one Na(6), and one S(4) atom to form distorted SNa3S trigonal pyramids that share corners with three equivalent O(8)Na3S trigonal pyramids and  an edgeedge with one O(6)Na3O tetrahedra. In the second S site, S(2) is bonded in a trigonal non-coplanar geometry to one O(3), one O(8), and one O(9) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Na(1), one Na(4), one Na(5), one Na(6), and one S(6) atom. In the fourth S site, S(4) is bonded in a 3-coordinate geometry to one Na(3), one S(1), and one S(5) atom. In the fifth S site, S(5) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Na(5), and one S(4) atom. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Na(5), and one S(3) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one O(2) and one O(5) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one O(1), and one O(6) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Na(3), and one S(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Na(5) and one O(7) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(4), one Na(6), and one O(1) atom. In the sixth O site, O(6) is bonded to one Na(1), one Na(2), one Na(6), and one O(2) atom to form ONa3O tetrahedra that share  a cornercorner with one O(9)Na3S trigonal pyramid, corners with two equivalent O(8)Na3S trigonal pyramids, and  an edgeedge with one S(1)Na3S trigonal pyramid. In the seventh O site, O(7) is bonded in a distorted L-shaped geometry to one Na(5) and one O(4) atom. In the eighth O site, O(8) is bonded to one Na(1), one Na(4), one Na(6), and one S(2) atom to form distorted ONa3S trigonal pyramids that share corners with two equivalent O(6)Na3O tetrahedra,  a cornercorner with one O(9)Na3S trigonal pyramid, and corners with three equivalent S(1)Na3S trigonal pyramids. In the ninth O site, O(9) is bonded to one Na(2), one Na(3), one Na(5), and one S(2) atom to form distorted ONa3S trigonal pyramids that share  a cornercorner with one O(6)Na3O tetrahedra and  a cornercorner with one O(8)Na3S trigonal pyramid. is represented by the CIF card [CIF]
data_Na2S2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.715
_cell_length_b   7.818
_cell_length_c   9.460
_cell_angle_alpha   85.367
_cell_angle_beta   83.096
_cell_angle_gamma   63.999
_symmetry_Int_Tables_number   1
_cell_volume   508.848
_cell_formula_units_Z   3
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  0.802  0.939  0.219  1.0
  Na  Na1  1  0.503  0.082  0.877  1.0
  Na  Na2  1  0.849  0.360  0.801  1.0
  Na  Na3  1  0.875  0.320  0.234  1.0
  Na  Na4  1  0.242  0.002  0.639  1.0
  Na  Na5  1  0.308  0.982  0.255  1.0
  S  S6  1  0.653  0.676  0.336  1.0
  S  S7  1  0.056  0.999  0.959  1.0
  S  S8  1  0.982  0.997  0.434  1.0
  S  S9  1  0.780  0.644  0.522  1.0
  S  S10  1  0.584  0.704  0.699  1.0
  S  S11  1  0.889  0.007  0.641  1.0
  O  O12  1  0.245  0.443  0.173  1.0
  O  O13  1  0.504  0.275  0.159  1.0
  O  O14  1  0.837  0.110  0.941  1.0
  O  O15  1  0.254  0.274  0.486  1.0
  O  O16  1  0.169  0.337  0.144  1.0
  O  O17  1  0.493  0.119  0.126  1.0
  O  O18  1  0.428  0.165  0.519  1.0
  O  O19  1  0.063  0.022  0.120  1.0
  O  O20  1  0.151  0.122  0.875  1.0
[/CIF]
.
The structure described by Na2S2O3 crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one S(1), one S(3), one O(2), one O(3), one O(6), and one O(8) atom. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to one S(5), one S(6), one O(3), one O(6), and one O(9) atom. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one S(4), one S(5), one S(6), one O(3), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 4-coordinate geometry to one S(1), one S(3), one O(5), and one O(8) atom. In the fifth Na site, Na(5) is bonded in a 6-coordinate geometry to one S(3), one S(5), one S(6), one O(4), one O(7), and one O(9) atom. In the sixth Na site, Na(6) is bonded in a 5-coordinate geometry to one S(1), one S(3), one O(5), one O(6), and one O(8) atom. There are six inequivalent S sites. In the first S site, S(1) is bonded to one Na(1), one Na(4), one Na(6), and one S(4) atom to form distorted SNa3S trigonal pyramids that share corners with three equivalent O(8)Na3S trigonal pyramids and  an edgeedge with one O(6)Na3O tetrahedra. In the second S site, S(2) is bonded in a trigonal non-coplanar geometry to one O(3), one O(8), and one O(9) atom. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Na(1), one Na(4), one Na(5), one Na(6), and one S(6) atom. In the fourth S site, S(4) is bonded in a 3-coordinate geometry to one Na(3), one S(1), and one S(5) atom. In the fifth S site, S(5) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Na(5), and one S(4) atom. In the sixth S site, S(6) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one Na(5), and one S(3) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a water-like geometry to one O(2) and one O(5) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Na(1), one O(1), and one O(6) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Na(3), and one S(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Na(5) and one O(7) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Na(4), one Na(6), and one O(1) atom. In the sixth O site, O(6) is bonded to one Na(1), one Na(2), one Na(6), and one O(2) atom to form ONa3O tetrahedra that share  a cornercorner with one O(9)Na3S trigonal pyramid, corners with two equivalent O(8)Na3S trigonal pyramids, and  an edgeedge with one S(1)Na3S trigonal pyramid. In the seventh O site, O(7) is bonded in a distorted L-shaped geometry to one Na(5) and one O(4) atom. In the eighth O site, O(8) is bonded to one Na(1), one Na(4), one Na(6), and one S(2) atom to form distorted ONa3S trigonal pyramids that share corners with two equivalent O(6)Na3O tetrahedra,  a cornercorner with one O(9)Na3S trigonal pyramid, and corners with three equivalent S(1)Na3S trigonal pyramids. In the ninth O site, O(9) is bonded to one Na(2), one Na(3), one Na(5), and one S(2) atom to form distorted ONa3S trigonal pyramids that share  a cornercorner with one O(6)Na3O tetrahedra and  a cornercorner with one O(8)Na3S trigonal pyramid. is represented by the CIF card [CIF]
data_Na2S2O3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.715
_cell_length_b   7.818
_cell_length_c   9.460
_cell_angle_alpha   85.367
_cell_angle_beta   83.096
_cell_angle_gamma   63.999
_symmetry_Int_Tables_number   1
_cell_volume   508.848
_cell_formula_units_Z   3
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  0.802  0.939  0.219  1.0
  Na  Na1  1  0.503  0.082  0.877  1.0
  Na  Na2  1  0.849  0.360  0.801  1.0
  Na  Na3  1  0.875  0.320  0.234  1.0
  Na  Na4  1  0.242  0.002  0.639  1.0
  Na  Na5  1  0.308  0.982  0.255  1.0
  S  S6  1  0.653  0.676  0.336  1.0
  S  S7  1  0.056  0.999  0.959  1.0
  S  S8  1  0.982  0.997  0.434  1.0
  S  S9  1  0.780  0.644  0.522  1.0
  S  S10  1  0.584  0.704  0.699  1.0
  S  S11  1  0.889  0.007  0.641  1.0
  O  O12  1  0.245  0.443  0.173  1.0
  O  O13  1  0.504  0.275  0.159  1.0
  O  O14  1  0.837  0.110  0.941  1.0
  O  O15  1  0.254  0.274  0.486  1.0
  O  O16  1  0.169  0.337  0.144  1.0
  O  O17  1  0.493  0.119  0.126  1.0
  O  O18  1  0.428  0.165  0.519  1.0
  O  O19  1  0.063  0.022  0.120  1.0
  O  O20  1  0.151  0.122  0.875  1.0
[/CIF]
.