data_[Na8Cu4H12]
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
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [4.8689]
_cell_length_b [12.0995]
_cell_length_c [5.5041]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.8314]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2CuH3]
_chemical_formula_sum '[Na8 Cu4 H12]'
_cell_volume [319.4895]
_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  4  0.0000  0.1557  0.5000  1.0
  Na  Na1  2  0.0000  0.0000  0.0000  1.0
  Na  Na2  2  0.0000  0.5000  0.5000  1.0
  Cu  Cu3  4  0.0000  0.2562  0.0000  1.0
  H  H4  8  0.2247  0.6842  0.8247  1.0
  H  H5  4  0.1868  0.0000  0.6928  1.0
]