data_[Ba4Ta2Si2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Ta  1.5000  1.4500  0.8200
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.5142]
_cell_length_b [3.2932]
_cell_length_c [7.2882]
_cell_angle_alpha [90.0000]
_cell_angle_beta [95.6286]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Ba2TaSi]
_chemical_formula_sum '[Ba4 Ta2 Si2]'
_cell_volume [251.1388]
_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
[
  Ba  Ba0  4  0.2400  0.5000  0.7407  1
  Ta  Ta1  2  0.0000  0.5000  0.0000  1
  Si  Si2  2  0.0000  0.0000  0.5000  1
]