data_[Rb2Si2Bi2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Si  1.9000  1.1000  0.5400
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.0665]
_cell_length_b [5.8389]
_cell_length_c [7.6191]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.1206]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbSiBiO4]
_chemical_formula_sum '[Rb2 Si2 Bi2 O8]'
_cell_volume [256.4984]
_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  2  0.3020  0.7500  0.0532  1.0
  Si  Si1  2  0.2589  0.2500  0.3349  1.0
  Bi  Bi2  2  0.2286  0.7500  0.5256  1.0
  O  O3  4  0.0861  0.0234  0.3117  1.0
  O  O4  2  0.4187  0.2500  0.1976  1.0
  O  O5  2  0.4452  0.2500  0.5499  1.0
]