data_[Rb2Ba2Cu4Br16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ba  0.8900  2.1500  1.4900
  Cu  1.9000  1.3500  0.8200
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [I-4]
_cell_length_a [7.6230]
_cell_length_b [7.6230]
_cell_length_c [13.8938]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [82]
_chemical_formula_structural [RbBa(CuBr4)2]
_chemical_formula_sum '[Rb2 Ba2 Cu4 Br16]'
_cell_volume [807.3615]
_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
[
  Rb  Rb0  2  0.0000  0.5000  0.7500  1.0
  Ba  Ba1  2  0.0000  0.0000  0.0000  1.0
  Cu  Cu2  2  0.0000  0.0000  0.5000  1.0
  Cu  Cu3  2  0.0000  0.5000  0.2500  1.0
  Br  Br4  8  0.0452  0.8050  0.2221  1.0
  Br  Br5  8  0.0811  0.3021  0.5212  1.0
]