data_[Ta18Pt21]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ta  1.5000  1.4500  0.8200
  Pt  2.2800  1.3500  0.8050
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.2308]
_cell_length_b [5.2308]
_cell_length_c [27.8130]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Ta6Pt7]
_chemical_formula_sum '[Ta18 Pt21]'
_cell_volume [659.0487]
_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
[
  Ta  Ta0  6  0.0000  0.0000  0.0474  1
  Ta  Ta1  6  0.0000  0.0000  0.1536  1
  Ta  Ta2  6  0.0000  0.0000  0.3326  1
  Pt  Pt3  18  0.0011  0.5005  0.9141  1
  Pt  Pt4  3  -0.0000  -0.0000  0.5000  1
]