data_[Rb8Na4Cu4Br20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Cu  1.9000  1.3500  0.8200
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.3483]
_cell_length_b [20.2613]
_cell_length_c [14.3097]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Rb2NaCuBr5]
_chemical_formula_sum '[Rb8 Na4 Cu4 Br20]'
_cell_volume [1260.7315]
_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
[
  Rb  Rb0  4  0.0000  0.1272  0.3328  1.0
  Rb  Rb1  4  0.0000  0.1355  0.6925  1.0
  Na  Na2  4  0.0000  0.2047  0.0391  1.0
  Cu  Cu3  4  0.0000  0.4357  0.4185  1.0
  Br  Br4  4  0.0000  0.0432  0.9943  1.0
  Br  Br5  4  0.0000  0.3063  0.6732  1.0
  Br  Br6  4  0.0000  0.3185  0.3872  1.0
  Br  Br7  4  0.0000  0.3460  0.0128  1.0
  Br  Br8  4  0.0000  0.4944  0.2737  1.0
]