data_[Na6Sr3Bi6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Bi  2.0200  1.6000  1.0350
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.3706]
_cell_length_b [5.3706]
_cell_length_c [19.9690]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Na2SrBi2]
_chemical_formula_sum '[Na6 Sr3 Bi6]'
_cell_volume [498.8144]
_cell_formula_units_Z [3]
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  6  0.0000  0.0000  0.2045  1.0
  Sr  Sr1  3  0.0000  0.0000  0.0000  1.0
  Bi  Bi2  6  0.0000  0.0000  0.4193  1.0
]