data_[Rb6Ce4O6F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ce  1.1200  1.8500  1.0800
  O  3.4400  0.6000  1.2600
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.4092]
_cell_length_b [4.7654]
_cell_length_c [23.5995]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Rb3Ce2O3F4]
_chemical_formula_sum '[Rb6 Ce4 O6 F8]'
_cell_volume [495.8654]
_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  0.0000  0.5000  0.3120  1
  Rb  Rb1  2  0.0000  0.5000  0.5000  1
  Ce  Ce2  4  0.0000  0.5000  0.0932  1
  O  O3  4  0.0000  0.0000  0.3995  1
  O  O4  2  0.0000  0.5000  0.0000  1
  F  F5  4  0.0000  0.0000  0.1002  1
  F  F6  4  0.0000  0.5000  0.1953  1
]