data_[Na4Ta2O2F10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ta  1.5000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [5.5559]
_cell_length_b [9.5419]
_cell_length_c [4.8213]
_cell_angle_alpha [90.0000]
_cell_angle_beta [91.1479]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [Na2TaOF5]
_chemical_formula_sum '[Na4 Ta2 O2 F10]'
_cell_volume [255.5450]
_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
[
  Na  Na0  4  0.4978  0.1623  0.4976  1.0
  Ta  Ta1  2  0.4780  0.5000  0.9808  1.0
  O  O2  2  0.2144  0.5000  0.7621  1.0
  F  F3  4  0.1503  0.1469  0.7743  1.0
  F  F4  4  0.3622  0.3535  0.2364  1.0
  F  F5  2  0.2870  0.0000  0.2404  1.0
]