data_[Ta2Si20W8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ta  1.5000  1.4500  0.8200
  Si  1.9000  1.1000  0.5400
  W  2.3600  1.3500  0.7667
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [3.2385]
_cell_length_b [3.2385]
_cell_length_c [39.7066]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [Ta(Si5W2)2]
_chemical_formula_sum '[Ta2 Si20 W8]'
_cell_volume [416.4416]
_cell_formula_units_Z [2]
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  2  0.0000  0.0000  0.0000  1.0
  Si  Si1  4  0.0000  0.0000  0.0681  1.0
  Si  Si2  4  0.0000  0.0000  0.1340  1.0
  Si  Si3  4  0.0000  0.0000  0.2668  1.0
  Si  Si4  4  0.0000  0.0000  0.3323  1.0
  Si  Si5  4  0.0000  0.0000  0.4653  1.0
  W  W6  4  0.0000  0.0000  0.2005  1.0
  W  W7  4  0.0000  0.0000  0.3984  1.0
]