data_[Rb2Bi2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Bi  2.0200  1.6000  1.0350
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P2_1]
_cell_length_a [6.4745]
_cell_length_b [4.4561]
_cell_length_c [9.0768]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.4606]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [4]
_chemical_formula_structural [RbBiF4]
_chemical_formula_sum '[Rb2 Bi2 F8]'
_cell_volume [260.2105]
_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  0.2209  0.7110  0.8748  1.0
  Bi  Bi1  2  0.3232  0.6894  0.3286  1.0
  F  F2  2  0.0429  0.6978  0.1649  1.0
  F  F3  2  0.2877  0.1916  0.2647  1.0
  F  F4  2  0.3611  0.9886  0.5656  1.0
  F  F5  2  0.4979  0.2188  0.8523  1.0
]