data_[Rb6Se2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [10.8389]
_cell_length_b [5.6916]
_cell_length_c [5.6864]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Rb3SeO4]
_chemical_formula_sum '[Rb6 Se2 O8]'
_cell_volume [350.8012]
_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  0.2497  0.2464  0.5496  1.0
  Rb  Rb1  2  0.0000  0.7339  0.5440  1.0
  Se  Se2  2  0.0000  0.2010  0.0029  1.0
  O  O3  4  0.1672  0.2649  0.0618  1.0
  O  O4  2  0.0000  0.2289  0.6988  1.0
  O  O5  2  0.0000  0.8990  0.0467  1.0
]