data_[Rb4Na2Ta2O2F10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  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 [I4mm]
_cell_length_a [6.2499]
_cell_length_b [6.2499]
_cell_length_c [8.7254]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [Rb2NaTaOF5]
_chemical_formula_sum '[Rb4 Na2 Ta2 O2 F10]'
_cell_volume [340.8208]
_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
[
  Rb  Rb0  4  0.0000  0.5000  0.2547  1.0
  Na  Na1  2  0.0000  0.0000  0.4969  1.0
  Ta  Ta2  2  0.0000  0.0000  0.0194  1.0
  O  O3  2  0.0000  0.0000  0.2274  1.0
  F  F4  8  0.2352  0.7648  0.9934  1.0
  F  F5  2  0.0000  0.0000  0.7732  1.0
]