data_[La4Ta4O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  La  1.1000  1.9500  1.1720
  Ta  1.5000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.7167]
_cell_length_b [3.9234]
_cell_length_c [6.7519]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.3860]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [La2Ta2O9]
_chemical_formula_sum '[La4 Ta4 O18]'
_cell_volume [387.6771]
_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
[
  La  La0  4  0.1936  0.5000  0.1871  1
  Ta  Ta1  4  0.0396  0.0000  0.8043  1
  O  O2  4  0.0481  0.5000  0.8358  1
  O  O3  4  0.0784  0.0000  0.1538  1
  O  O4  4  0.1748  0.0000  0.9160  1
  O  O5  4  0.2228  0.5000  0.5682  1
  O  O6  2  0.0000  0.0000  0.5000  1
]