data_[Rb8Fe4O12]
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
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [10.5308]
_cell_length_b [7.4634]
_cell_length_c [5.4560]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.1174]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Rb2FeO3]
_chemical_formula_sum '[Rb8 Fe4 O12]'
_cell_volume [428.7313]
_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  8  0.1596  0.3508  0.7363  1.0
  Fe  Fe1  4  0.0000  0.0780  0.2500  1.0
  O  O2  8  0.1183  0.0319  0.9994  1.0
  O  O3  4  0.0000  0.3218  0.2500  1.0
]