data_[Ba18Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [R-3c]
_cell_length_a [7.9769]
_cell_length_b [7.9769]
_cell_length_c [23.7003]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [167]
_chemical_formula_structural [Ba3Se2]
_chemical_formula_sum '[Ba18 Se12]'
_cell_volume [1306.0401]
_cell_formula_units_Z [6]
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  18  0.0000  0.3298  0.7500  1
  Se  Se1  12  0.0000  0.0000  0.1637  1
]