data_[Rb8Sn4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sn  1.9600  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.6810]
_cell_length_b [4.5146]
_cell_length_c [10.3444]
_cell_angle_alpha [90.0000]
_cell_angle_beta [100.2548]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2SnO2]
_chemical_formula_sum '[Rb8 Sn4 O8]'
_cell_volume [628.7114]
_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  0.0935  0.0000  0.8279  1
  Rb  Rb1  4  0.1436  0.5000  0.5449  1
  Sn  Sn2  4  0.1340  0.5000  0.1882  1
  O  O3  4  0.0198  0.5000  0.2827  1
  O  O4  4  0.2454  0.0000  0.6740  1
]