data_[Na4U4Cu4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  U  1.3800  1.7500  0.9913
  Cu  1.9000  1.3500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [6.3928]
_cell_length_b [9.5299]
_cell_length_c [7.9944]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.1392]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [NaUCuO5]
_chemical_formula_sum '[Na4 U4 Cu4 O20]'
_cell_volume [457.2645]
_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  0.3235  0.2500  1
  U  U1  4  0.0000  0.0000  0.0000  1
  Cu  Cu2  4  0.0000  0.3337  0.7500  1
  O  O3  8  0.0409  0.2035  0.5886  1
  O  O4  8  0.1653  0.4708  0.9125  1
  O  O5  4  0.0000  0.0798  0.2500  1
]