data_[Ba3Na6Pb3Br18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Na  0.9300  1.8000  1.1600
  Pb  2.3300  1.8000  1.1225
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [7.7919]
_cell_length_b [7.7919]
_cell_length_c [20.7587]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [BaNa2PbBr6]
_chemical_formula_sum '[Ba3 Na6 Pb3 Br18]'
_cell_volume [1091.4960]
_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
[
  Ba  Ba0  3  0.0000  0.0000  0.8100  1.0
  Na  Na1  3  0.0000  0.0000  0.0109  1.0
  Na  Na2  3  0.0000  0.0000  0.5176  1.0
  Pb  Pb3  3  0.0000  0.0000  0.3178  1.0
  Br  Br4  9  0.0332  0.3522  0.5855  1.0
  Br  Br5  9  0.0601  0.7036  0.0828  1.0
]