data_[Rb2Cu2Sn2Br8]
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
  Sn  1.9600  1.4500  0.8300
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.6699]
_cell_length_b [7.8064]
_cell_length_c [9.4859]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.8220]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbCuSnBr4]
_chemical_formula_sum '[Rb2 Cu2 Sn2 Br8]'
_cell_volume [464.6479]
_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  0.2570  0.2500  0.0599  1
  Cu  Cu1  2  0.1794  0.7500  0.3246  1
  Sn  Sn2  2  0.2107  0.2500  0.5542  1
  Br  Br3  4  0.0296  0.5123  0.7265  1
  Br  Br4  2  0.4171  0.7500  0.1629  1
  Br  Br5  2  0.4511  0.7500  0.5753  1
]