data_[Rb8Na4F12]
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
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.6231]
_cell_length_b [19.8701]
_cell_length_c [6.6487]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [Rb2NaF3]
_chemical_formula_sum '[Rb8 Na4 F12]'
_cell_volume [478.6476]
_cell_formula_units_Z [4]
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  0.0061  0.7500  1
  Rb  Rb1  4  0.0000  0.1704  0.2500  1
  Na  Na2  4  0.0000  0.3418  0.2500  1
  F  F3  8  0.0000  0.4155  0.5043  1
  F  F4  4  0.0000  0.2213  0.7500  1
]