data_[Na2Cu4H6O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Cu  1.9000  1.3500  0.8200
  H  2.2000  0.2500  0.0000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.9201]
_cell_length_b [5.9317]
_cell_length_c [6.8707]
_cell_angle_alpha [90.0000]
_cell_angle_beta [116.3833]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaCu2H3O10]
_chemical_formula_sum '[Na2 Cu4 H6 O20]'
_cell_volume [398.6898]
_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  2  0.0000  0.0000  0.0000  1.0
  Cu  Cu1  4  0.2500  0.2500  0.5000  1.0
  H  H2  4  0.0055  0.5000  0.2519  1.0
  H  H3  2  0.0000  0.5000  0.5000  1.0
  O  O4  8  0.2142  0.1945  0.1821  1.0
  O  O5  4  0.0716  0.5000  0.4045  1.0
  O  O6  4  0.1481  0.0000  0.4709  1.0
  O  O7  4  0.2210  0.5000  0.8316  1.0
]