data_[Na2Ti4Bi2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ti  1.5400  1.4000  0.8517
  Bi  2.0200  1.6000  1.0350
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmm2]
_cell_length_a [7.7018]
_cell_length_b [7.7889]
_cell_length_c [4.2308]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [35]
_chemical_formula_structural [NaTi2BiO6]
_chemical_formula_sum '[Na2 Ti4 Bi2 O12]'
_cell_volume [253.8008]
_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
[
  Na  Na0  2  0.0000  0.0000  0.4350  1.0
  Ti  Ti1  4  0.2500  0.2500  0.9772  1.0
  Bi  Bi2  2  0.0000  0.5000  0.3886  1.0
  O  O3  4  0.0000  0.2493  0.0786  1.0
  O  O4  4  0.2335  0.5000  0.0628  1.0
  O  O5  4  0.2500  0.2500  0.5596  1.0
]