data_[Rb2Na4U4O14]
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
  U  1.3800  1.7500  0.9913
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/mmm]
_cell_length_a [4.3486]
_cell_length_b [4.3486]
_cell_length_c [19.9566]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [139]
_chemical_formula_structural [RbNa2U2O7]
_chemical_formula_sum '[Rb2 Na4 U4 O14]'
_cell_volume [377.3850]
_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  2  0.0000  0.0000  0.0000  1
  Na  Na1  4  0.0000  0.5000  0.2500  1
  U  U2  4  0.0000  0.0000  0.3913  1
  O  O3  8  0.0000  0.5000  0.1085  1
  O  O4  4  0.0000  0.0000  0.2912  1
  O  O5  2  0.0000  0.0000  0.5000  1
]