data_[Rb4Fe2Se4O12]
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
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.4421]
_cell_length_b [5.9494]
_cell_length_c [7.2828]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.6099]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Fe(SeO3)2]
_chemical_formula_sum '[Rb4 Fe2 Se4 O12]'
_cell_volume [380.3596]
_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  0.2033  0.5000  0.1452  1
  Fe  Fe1  2  0.0000  0.5000  0.5000  1
  Se  Se2  4  0.0934  0.0000  0.2532  1
  O  O3  8  0.0124  0.2318  0.7248  1
  O  O4  4  0.2393  0.5000  0.5467  1
]