The structure described by Na6ZnH4(S2O9)2 crystallizes in the triclinic P-1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(8), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(3), one O(5), one O(6), one O(8), and two equivalent O(2) atoms. In the third Na site, Na(3) is bonded to one O(2), one O(3), two equivalent O(4), and two equivalent O(6) atoms to form distorted NaO6 pentagonal pyramids that share corners with two equivalent S(1)O4 tetrahedra, corners with two equivalent S(2)O4 tetrahedra, edges with two equivalent Na(3)O6 pentagonal pyramids, and  an edgeedge with one S(1)O4 tetrahedra. Zn(1) is bonded to two equivalent O(1), two equivalent O(7), and two equivalent O(9) atoms to form ZnO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra and corners with two equivalent S(2)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) and one O(9) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share  a cornercorner with one Zn(1)O6 octahedra, corners with two equivalent Na(3)O6 pentagonal pyramids, and  an edgeedge with one Na(3)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 48°. In the second S site, S(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SO4 tetrahedra that share  a cornercorner with one Zn(1)O6 octahedra and corners with two equivalent Na(3)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 51°. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one S(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(3), two equivalent Na(2), and one S(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one H(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Na(3), and one S(1) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one Na(2), two equivalent Na(1), and one S(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(3), and one S(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Zn(1), and one S(2) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one Na(1), one Na(2), and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Na(1), one Zn(1), one H(1), and one H(2) atom. is represented by the CIF file [CIF]
data_Na6ZnH4(S2O9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.133
_cell_length_b   6.914
_cell_length_c   10.260
_cell_angle_alpha   70.231
_cell_angle_beta   77.183
_cell_angle_gamma   74.792
_symmetry_Int_Tables_number   1
_cell_volume   390.850
_cell_formula_units_Z   1
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  0.440  0.292  0.893  1.0
  Na  Na1  1  0.560  0.708  0.107  1.0
  Na  Na2  1  0.958  0.784  0.668  1.0
  Na  Na3  1  0.042  0.216  0.332  1.0
  Na  Na4  1  0.391  0.262  0.537  1.0
  Na  Na5  1  0.609  0.738  0.463  1.0
  Zn  Zn6  1  0.000  0.000  0.000  1.0
  H  H7  1  0.991  0.368  0.866  1.0
  H  H8  1  0.009  0.632  0.134  1.0
  H  H9  1  0.913  0.356  0.031  1.0
  H  H10  1  0.087  0.644  0.969  1.0
  S  S11  1  0.875  0.267  0.675  1.0
  S  S12  1  0.125  0.733  0.325  1.0
  S  S13  1  0.446  0.795  0.801  1.0
  S  S14  1  0.554  0.205  0.199  1.0
  O  O15  1  0.823  0.117  0.818  1.0
  O  O16  1  0.177  0.883  0.182  1.0
  O  O17  1  0.012  0.145  0.579  1.0
  O  O18  1  0.988  0.855  0.421  1.0
  O  O19  1  0.013  0.411  0.684  1.0
  O  O20  1  0.987  0.589  0.316  1.0
  O  O21  1  0.653  0.386  0.627  1.0
  O  O22  1  0.347  0.614  0.373  1.0
  O  O23  1  0.635  0.648  0.874  1.0
  O  O24  1  0.365  0.352  0.126  1.0
  O  O25  1  0.536  0.901  0.654  1.0
  O  O26  1  0.464  0.099  0.346  1.0
  O  O27  1  0.334  0.958  0.876  1.0
  O  O28  1  0.666  0.042  0.124  1.0
  O  O29  1  0.270  0.677  0.803  1.0
  O  O30  1  0.730  0.323  0.197  1.0
  O  O31  1  0.034  0.303  0.962  1.0
  O  O32  1  0.966  0.697  0.038  1.0
[/CIF]
.
The structure described by Na6ZnH4(S2O9)2 crystallizes in the triclinic P-1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(8), one O(9), two equivalent O(5), and two equivalent O(7) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(3), one O(5), one O(6), one O(8), and two equivalent O(2) atoms. In the third Na site, Na(3) is bonded to one O(2), one O(3), two equivalent O(4), and two equivalent O(6) atoms to form distorted NaO6 pentagonal pyramids that share corners with two equivalent S(1)O4 tetrahedra, corners with two equivalent S(2)O4 tetrahedra, edges with two equivalent Na(3)O6 pentagonal pyramids, and  an edgeedge with one S(1)O4 tetrahedra. Zn(1) is bonded to two equivalent O(1), two equivalent O(7), and two equivalent O(9) atoms to form ZnO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra and corners with two equivalent S(2)O4 tetrahedra. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(3) and one O(9) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(9) atom. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form SO4 tetrahedra that share  a cornercorner with one Zn(1)O6 octahedra, corners with two equivalent Na(3)O6 pentagonal pyramids, and  an edgeedge with one Na(3)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles are 48°. In the second S site, S(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form SO4 tetrahedra that share  a cornercorner with one Zn(1)O6 octahedra and corners with two equivalent Na(3)O6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 51°. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one S(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(3), two equivalent Na(2), and one S(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one H(1), and one S(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Na(3), and one S(1) atom. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to one Na(2), two equivalent Na(1), and one S(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(3), and one S(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to two equivalent Na(1), one Zn(1), and one S(2) atom. In the eighth O site, O(8) is bonded in a 1-coordinate geometry to one Na(1), one Na(2), and one S(2) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Na(1), one Zn(1), one H(1), and one H(2) atom. is represented by the CIF file [CIF]
data_Na6ZnH4(S2O9)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.133
_cell_length_b   6.914
_cell_length_c   10.260
_cell_angle_alpha   70.231
_cell_angle_beta   77.183
_cell_angle_gamma   74.792
_symmetry_Int_Tables_number   1
_cell_volume   390.850
_cell_formula_units_Z   1
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  0.440  0.292  0.893  1.0
  Na  Na1  1  0.560  0.708  0.107  1.0
  Na  Na2  1  0.958  0.784  0.668  1.0
  Na  Na3  1  0.042  0.216  0.332  1.0
  Na  Na4  1  0.391  0.262  0.537  1.0
  Na  Na5  1  0.609  0.738  0.463  1.0
  Zn  Zn6  1  0.000  0.000  0.000  1.0
  H  H7  1  0.991  0.368  0.866  1.0
  H  H8  1  0.009  0.632  0.134  1.0
  H  H9  1  0.913  0.356  0.031  1.0
  H  H10  1  0.087  0.644  0.969  1.0
  S  S11  1  0.875  0.267  0.675  1.0
  S  S12  1  0.125  0.733  0.325  1.0
  S  S13  1  0.446  0.795  0.801  1.0
  S  S14  1  0.554  0.205  0.199  1.0
  O  O15  1  0.823  0.117  0.818  1.0
  O  O16  1  0.177  0.883  0.182  1.0
  O  O17  1  0.012  0.145  0.579  1.0
  O  O18  1  0.988  0.855  0.421  1.0
  O  O19  1  0.013  0.411  0.684  1.0
  O  O20  1  0.987  0.589  0.316  1.0
  O  O21  1  0.653  0.386  0.627  1.0
  O  O22  1  0.347  0.614  0.373  1.0
  O  O23  1  0.635  0.648  0.874  1.0
  O  O24  1  0.365  0.352  0.126  1.0
  O  O25  1  0.536  0.901  0.654  1.0
  O  O26  1  0.464  0.099  0.346  1.0
  O  O27  1  0.334  0.958  0.876  1.0
  O  O28  1  0.666  0.042  0.124  1.0
  O  O29  1  0.270  0.677  0.803  1.0
  O  O30  1  0.730  0.323  0.197  1.0
  O  O31  1  0.034  0.303  0.962  1.0
  O  O32  1  0.966  0.697  0.038  1.0
[/CIF]
.