The material structure described by Na2Cu(OH)4 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one H(1), one O(1), one O(3), one O(4), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 12-coordinate geometry to one H(1), one H(2), two equivalent H(3), two equivalent H(4), one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Na(1), one Na(2), and one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Na(2) and one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to two equivalent Na(2) and one O(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to two equivalent Na(2) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(2) is bonded in a distorted single-bond geometry to one Na(2), two equivalent Na(1), one Cu(1), and one H(2) atom. In the second O site, O(3) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Na(2), one Cu(1), and one H(3) atom. In the third O site, O(4) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Na(2), one Cu(1), and one H(4) atom. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to one Na(1), one Na(2), one Cu(1), and one H(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Cu(HO)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.734
_cell_length_b   6.739
_cell_length_c   9.062
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   411.272
_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  0.792  0.001  0.749  1.0
  Na  Na1  1  0.208  0.999  0.249  1.0
  Na  Na2  1  0.292  0.499  0.249  1.0
  Na  Na3  1  0.708  0.501  0.749  1.0
  Na  Na4  1  0.496  0.752  0.498  1.0
  Na  Na5  1  0.504  0.248  0.998  1.0
  Na  Na6  1  0.996  0.748  0.998  1.0
  Na  Na7  1  0.004  0.252  0.498  1.0
  Cu  Cu8  1  0.497  0.764  0.999  1.0
  Cu  Cu9  1  0.503  0.236  0.499  1.0
  Cu  Cu10  1  0.997  0.736  0.499  1.0
  Cu  Cu11  1  0.003  0.264  0.999  1.0
  H  H12  1  0.538  0.090  0.256  1.0
  H  H13  1  0.462  0.910  0.756  1.0
  H  H14  1  0.038  0.410  0.756  1.0
  H  H15  1  0.962  0.590  0.256  1.0
  H  H16  1  0.161  0.746  0.737  1.0
  H  H17  1  0.839  0.254  0.237  1.0
  H  H18  1  0.661  0.754  0.237  1.0
  H  H19  1  0.339  0.246  0.737  1.0
  H  H20  1  0.235  0.990  0.595  1.0
  H  H21  1  0.765  0.010  0.095  1.0
  H  H22  1  0.735  0.510  0.095  1.0
  H  H23  1  0.265  0.490  0.595  1.0
  H  H24  1  0.251  1.000  0.904  1.0
  H  H25  1  0.749  0.000  0.404  1.0
  H  H26  1  0.751  0.500  0.404  1.0
  H  H27  1  0.249  0.500  0.904  1.0
  O  O28  1  0.485  0.767  0.777  1.0
  O  O29  1  0.515  0.233  0.277  1.0
  O  O30  1  0.985  0.733  0.277  1.0
  O  O31  1  0.015  0.267  0.777  1.0
  O  O32  1  0.521  0.790  0.220  1.0
  O  O33  1  0.479  0.210  0.720  1.0
  O  O34  1  0.021  0.710  0.720  1.0
  O  O35  1  0.979  0.290  0.220  1.0
  O  O36  1  0.698  0.551  0.996  1.0
  O  O37  1  0.302  0.449  0.496  1.0
  O  O38  1  0.198  0.949  0.496  1.0
  O  O39  1  0.802  0.051  0.996  1.0
  O  O40  1  0.285  0.963  0.006  1.0
  O  O41  1  0.715  0.037  0.506  1.0
  O  O42  1  0.785  0.537  0.506  1.0
  O  O43  1  0.215  0.463  0.006  1.0
[/CIF]
.
The material structure described by Na2Cu(OH)4 crystallizes in the orthorhombic Pna2_1 space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 6-coordinate geometry to one H(1), one O(1), one O(3), one O(4), and two equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a 12-coordinate geometry to one H(1), one H(2), two equivalent H(3), two equivalent H(4), one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one Na(1), one Na(2), and one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Na(2) and one O(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to two equivalent Na(2) and one O(3) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to two equivalent Na(2) and one O(4) atom. There are four inequivalent O sites. In the first O site, O(2) is bonded in a distorted single-bond geometry to one Na(2), two equivalent Na(1), one Cu(1), and one H(2) atom. In the second O site, O(3) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Na(2), one Cu(1), and one H(3) atom. In the third O site, O(4) is bonded in a distorted single-bond geometry to one Na(1), two equivalent Na(2), one Cu(1), and one H(4) atom. In the fourth O site, O(1) is bonded in a distorted single-bond geometry to one Na(1), one Na(2), one Cu(1), and one H(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2Cu(HO)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.734
_cell_length_b   6.739
_cell_length_c   9.062
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   411.272
_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  0.792  0.001  0.749  1.0
  Na  Na1  1  0.208  0.999  0.249  1.0
  Na  Na2  1  0.292  0.499  0.249  1.0
  Na  Na3  1  0.708  0.501  0.749  1.0
  Na  Na4  1  0.496  0.752  0.498  1.0
  Na  Na5  1  0.504  0.248  0.998  1.0
  Na  Na6  1  0.996  0.748  0.998  1.0
  Na  Na7  1  0.004  0.252  0.498  1.0
  Cu  Cu8  1  0.497  0.764  0.999  1.0
  Cu  Cu9  1  0.503  0.236  0.499  1.0
  Cu  Cu10  1  0.997  0.736  0.499  1.0
  Cu  Cu11  1  0.003  0.264  0.999  1.0
  H  H12  1  0.538  0.090  0.256  1.0
  H  H13  1  0.462  0.910  0.756  1.0
  H  H14  1  0.038  0.410  0.756  1.0
  H  H15  1  0.962  0.590  0.256  1.0
  H  H16  1  0.161  0.746  0.737  1.0
  H  H17  1  0.839  0.254  0.237  1.0
  H  H18  1  0.661  0.754  0.237  1.0
  H  H19  1  0.339  0.246  0.737  1.0
  H  H20  1  0.235  0.990  0.595  1.0
  H  H21  1  0.765  0.010  0.095  1.0
  H  H22  1  0.735  0.510  0.095  1.0
  H  H23  1  0.265  0.490  0.595  1.0
  H  H24  1  0.251  1.000  0.904  1.0
  H  H25  1  0.749  0.000  0.404  1.0
  H  H26  1  0.751  0.500  0.404  1.0
  H  H27  1  0.249  0.500  0.904  1.0
  O  O28  1  0.485  0.767  0.777  1.0
  O  O29  1  0.515  0.233  0.277  1.0
  O  O30  1  0.985  0.733  0.277  1.0
  O  O31  1  0.015  0.267  0.777  1.0
  O  O32  1  0.521  0.790  0.220  1.0
  O  O33  1  0.479  0.210  0.720  1.0
  O  O34  1  0.021  0.710  0.720  1.0
  O  O35  1  0.979  0.290  0.220  1.0
  O  O36  1  0.698  0.551  0.996  1.0
  O  O37  1  0.302  0.449  0.496  1.0
  O  O38  1  0.198  0.949  0.496  1.0
  O  O39  1  0.802  0.051  0.996  1.0
  O  O40  1  0.285  0.963  0.006  1.0
  O  O41  1  0.715  0.037  0.506  1.0
  O  O42  1  0.785  0.537  0.506  1.0
  O  O43  1  0.215  0.463  0.006  1.0
[/CIF]
.