data_[Na6Se2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  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 [Pmn2_1]
_cell_length_a [9.0832]
_cell_length_b [4.9088]
_cell_length_c [4.9072]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na3SeO4]
_chemical_formula_sum '[Na6 Se2 O8]'
_cell_volume [218.8017]
_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
[
  Na  Na0  4  0.2500  0.7441  0.0535  1.0
  Na  Na1  2  0.0000  0.7427  0.5495  1.0
  Se  Se2  2  0.0000  0.2035  0.0122  1.0
  O  O3  4  0.2015  0.2577  0.0668  1.0
  O  O4  2  0.0000  0.2447  0.6601  1.0
  O  O5  2  0.0000  0.8514  0.0526  1.0
]