data_[Rb8O6F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  O  3.4400  0.6000  1.2600
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [11.0616]
_cell_length_b [4.7825]
_cell_length_c [9.4741]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [Rb4O3F4]
_chemical_formula_sum '[Rb8 O6 F8]'
_cell_volume [501.2004]
_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  4  0.2536  0.0000  0.6838  1
  Rb  Rb1  2  0.0000  0.0000  0.0077  1
  Rb  Rb2  2  0.5000  0.0000  0.0008  1
  O  O3  4  0.1008  0.0000  0.3727  1
  O  O4  2  0.0000  0.0000  0.3006  1
  F  F5  4  0.2533  0.0000  0.0041  1
  F  F6  2  0.0000  0.0000  0.6992  1
  F  F7  2  0.5000  0.0000  0.6774  1
]