data_[Na8Si16Pt20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Si  1.9000  1.1000  0.5400
  Pt  2.2800  1.3500  0.8050
]
_symmetry_space_group_name_H-M [Fmmm]
_cell_length_a [5.5159]
_cell_length_b [9.9180]
_cell_length_c [14.7315]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [69]
_chemical_formula_structural [Na2Si4Pt5]
_chemical_formula_sum '[Na8 Si16 Pt20]'
_cell_volume [805.9123]
_cell_formula_units_Z [4]
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  8  0.0000  0.0000  0.1243  1.0
  Si  Si1  16  0.0000  0.1612  0.3722  1.0
  Pt  Pt2  8  0.2500  0.2500  0.0000  1.0
  Pt  Pt3  8  0.2500  0.2500  0.2500  1.0
  Pt  Pt4  4  0.0000  0.0000  0.5000  1.0
]