data_[Rb10Fe2O8]
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 [Pmn2_1]
_cell_length_a [8.7500]
_cell_length_b [7.4333]
_cell_length_c [7.1886]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Rb5FeO4]
_chemical_formula_sum '[Rb10 Fe2 O8]'
_cell_volume [467.5545]
_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  0.1881  0.9480  0.4154  1.0
  Rb  Rb1  4  0.2177  0.3768  0.2365  1.0
  Rb  Rb2  2  0.0000  0.2446  0.7446  1.0
  Fe  Fe3  2  0.0000  0.8334  0.0114  1.0
  O  O4  4  0.1901  0.7237  0.0927  1.0
  O  O5  2  0.0000  0.0846  0.1044  1.0
  O  O6  2  0.0000  0.8524  0.7425  1.0
]