data_[Na6Sr18Pt6]
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
  Pt  2.2800  1.3500  0.8050
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [7.8959]
_cell_length_b [7.8959]
_cell_length_c [23.6058]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [NaSr3Pt]
_chemical_formula_sum '[Na6 Sr18 Pt6]'
_cell_volume [1274.5391]
_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
[
  Na  Na0  6  0.0000  0.0000  0.1794  1.0
  Sr  Sr1  18  0.0087  0.3037  0.6024  1.0
  Pt  Pt2  6  0.0000  0.0000  0.3162  1.0
]