The crystal structure described by Na3P2H4O7 crystallizes in the triclinic P-1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(4), and two equivalent O(3) atoms to form edge-sharing NaO5 trigonal bipyramids. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(2), one O(5), two equivalent O(6), and two equivalent O(7) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(7), and two equivalent O(1) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a bent 120 degrees geometry to one O(1) and one O(3) atom. In the second P site, P(2) is bonded in a trigonal non-coplanar geometry to one O(2), one O(4), and one O(5) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(7) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Na(3), and one P(1) atom. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), and one P(2) atom to form distorted corner-sharing ONa3P trigonal pyramids. In the third O site, O(3) is bonded to one Na(3), two equivalent Na(1), and one P(1) atom to form a mixture of distorted edge and corner-sharing ONa3P tetrahedra. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Na(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Na(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to two equivalent Na(2), one H(1), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Na(3), two equivalent Na(2), one H(3), and one H(4) atom. is represented by the CIF file [CIF]
data_Na3P2H4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.072
_cell_length_b   6.253
_cell_length_c   11.511
_cell_angle_alpha   99.350
_cell_angle_beta   95.493
_cell_angle_gamma   117.598
_symmetry_Int_Tables_number   1
_cell_volume   374.819
_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  0.926  0.827  0.120  1.0
  Na  Na1  1  0.074  0.173  0.880  1.0
  Na  Na2  1  0.727  0.696  0.413  1.0
  Na  Na3  1  0.273  0.304  0.587  1.0
  Na  Na4  1  0.329  0.493  0.144  1.0
  Na  Na5  1  0.671  0.507  0.856  1.0
  P  P6  1  0.656  0.166  0.071  1.0
  P  P7  1  0.344  0.834  0.929  1.0
  P  P8  1  0.596  0.077  0.250  1.0
  P  P9  1  0.404  0.923  0.750  1.0
  H  H10  1  0.216  0.807  0.513  1.0
  H  H11  1  0.784  0.193  0.487  1.0
  H  H12  1  0.240  0.900  0.389  1.0
  H  H13  1  0.760  0.100  0.611  1.0
  H  H14  1  0.267  0.243  0.330  1.0
  H  H15  1  0.733  0.757  0.670  1.0
  H  H16  1  0.101  0.376  0.358  1.0
  H  H17  1  0.899  0.624  0.642  1.0
  O  O18  1  0.628  0.393  0.059  1.0
  O  O19  1  0.372  0.607  0.941  1.0
  O  O20  1  0.668  0.871  0.248  1.0
  O  O21  1  0.332  0.129  0.752  1.0
  O  O22  1  0.913  0.184  0.057  1.0
  O  O23  1  0.087  0.816  0.943  1.0
  O  O24  1  0.311  0.982  0.251  1.0
  O  O25  1  0.689  0.018  0.749  1.0
  O  O26  1  0.771  0.318  0.345  1.0
  O  O27  1  0.229  0.682  0.655  1.0
  O  O28  1  0.174  0.903  0.464  1.0
  O  O29  1  0.826  0.097  0.536  1.0
  O  O30  1  0.278  0.405  0.364  1.0
  O  O31  1  0.722  0.595  0.636  1.0
[/CIF]
.
The crystal structure described by Na3P2H4O7 crystallizes in the triclinic P-1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded to one O(1), one O(2), one O(4), and two equivalent O(3) atoms to form edge-sharing NaO5 trigonal bipyramids. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(2), one O(5), two equivalent O(6), and two equivalent O(7) atoms. In the third Na site, Na(3) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(7), and two equivalent O(1) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a bent 120 degrees geometry to one O(1) and one O(3) atom. In the second P site, P(2) is bonded in a trigonal non-coplanar geometry to one O(2), one O(4), and one O(5) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(6) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(7) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(7) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Na(3), and one P(1) atom. In the second O site, O(2) is bonded to one Na(1), one Na(2), one Na(3), and one P(2) atom to form distorted corner-sharing ONa3P trigonal pyramids. In the third O site, O(3) is bonded to one Na(3), two equivalent Na(1), and one P(1) atom to form a mixture of distorted edge and corner-sharing ONa3P tetrahedra. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Na(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to one Na(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted water-like geometry to two equivalent Na(2), one H(1), and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted water-like geometry to one Na(3), two equivalent Na(2), one H(3), and one H(4) atom. is represented by the CIF file [CIF]
data_Na3P2H4O7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.072
_cell_length_b   6.253
_cell_length_c   11.511
_cell_angle_alpha   99.350
_cell_angle_beta   95.493
_cell_angle_gamma   117.598
_symmetry_Int_Tables_number   1
_cell_volume   374.819
_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  0.926  0.827  0.120  1.0
  Na  Na1  1  0.074  0.173  0.880  1.0
  Na  Na2  1  0.727  0.696  0.413  1.0
  Na  Na3  1  0.273  0.304  0.587  1.0
  Na  Na4  1  0.329  0.493  0.144  1.0
  Na  Na5  1  0.671  0.507  0.856  1.0
  P  P6  1  0.656  0.166  0.071  1.0
  P  P7  1  0.344  0.834  0.929  1.0
  P  P8  1  0.596  0.077  0.250  1.0
  P  P9  1  0.404  0.923  0.750  1.0
  H  H10  1  0.216  0.807  0.513  1.0
  H  H11  1  0.784  0.193  0.487  1.0
  H  H12  1  0.240  0.900  0.389  1.0
  H  H13  1  0.760  0.100  0.611  1.0
  H  H14  1  0.267  0.243  0.330  1.0
  H  H15  1  0.733  0.757  0.670  1.0
  H  H16  1  0.101  0.376  0.358  1.0
  H  H17  1  0.899  0.624  0.642  1.0
  O  O18  1  0.628  0.393  0.059  1.0
  O  O19  1  0.372  0.607  0.941  1.0
  O  O20  1  0.668  0.871  0.248  1.0
  O  O21  1  0.332  0.129  0.752  1.0
  O  O22  1  0.913  0.184  0.057  1.0
  O  O23  1  0.087  0.816  0.943  1.0
  O  O24  1  0.311  0.982  0.251  1.0
  O  O25  1  0.689  0.018  0.749  1.0
  O  O26  1  0.771  0.318  0.345  1.0
  O  O27  1  0.229  0.682  0.655  1.0
  O  O28  1  0.174  0.903  0.464  1.0
  O  O29  1  0.826  0.097  0.536  1.0
  O  O30  1  0.278  0.405  0.364  1.0
  O  O31  1  0.722  0.595  0.636  1.0
[/CIF]
.