data_[Sr3Si9Pt18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Si  1.9000  1.1000  0.5400
  Pt  2.2800  1.3500  0.8050
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [6.3446]
_cell_length_b [6.3446]
_cell_length_c [15.8413]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Sr(SiPt2)3]
_chemical_formula_sum '[Sr3 Si9 Pt18]'
_cell_volume [552.2494]
_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
[
  Sr  Sr0  3  0.0000  0.0000  0.0786  1
  Si  Si1  3  0.0000  0.0000  0.3107  1
  Si  Si2  3  0.0000  0.0000  0.6874  1
  Si  Si3  3  0.0000  0.0000  0.8655  1
  Pt  Pt4  9  0.0332  0.4879  0.0970  1
  Pt  Pt5  9  0.0519  0.3738  0.2556  1
]