data_[Rb4Fe4O12F4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Fe  1.8300  1.4000  0.8525
  O  3.4400  0.6000  1.2600
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.3844]
_cell_length_b [9.1081]
_cell_length_c [4.7384]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.6914]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbFeO3F]
_chemical_formula_sum '[Rb4 Fe4 O12 F4]'
_cell_volume [385.8568]
_cell_formula_units_Z [4]
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  0.2571  0.0000  1
  Fe  Fe1  4  0.2421  0.5000  0.5618  1
  O  O2  8  0.1734  0.3505  0.6492  1
  O  O3  4  0.0780  0.0000  0.3214  1
  F  F4  4  0.1863  0.5000  0.1731  1
]