data_[Rb2Na4Se4O12]
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
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.2850]
_cell_length_b [6.2793]
_cell_length_c [6.5155]
_cell_angle_alpha [90.0000]
_cell_angle_beta [120.4855]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbNa2(SeO3)2]
_chemical_formula_sum '[Rb2 Na4 Se4 O12]'
_cell_volume [433.1315]
_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  0.5000  1.0
  Na  Na1  4  0.1514  0.5000  0.2934  1.0
  Se  Se2  4  0.2066  0.5000  0.8353  1.0
  O  O3  8  0.2035  0.2879  0.6681  1.0
  O  O4  4  0.0694  0.5000  0.8416  1.0
]