data_[Rb2Cu4Br6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cu  1.9000  1.3500  0.8200
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.0161]
_cell_length_b [5.6116]
_cell_length_c [8.1307]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.1661]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbCu2Br3]
_chemical_formula_sum '[Rb2 Cu4 Br6]'
_cell_volume [349.4467]
_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  0.3370  0.7500  0.6747  1.0
  Cu  Cu1  4  0.1543  0.0147  0.1230  1.0
  Br  Br2  2  0.0976  0.2500  0.8479  1.0
  Br  Br3  2  0.2194  0.2500  0.3944  1.0
  Br  Br4  2  0.4011  0.7500  0.1264  1.0
]