data_[Rb4H4Se4O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  H  2.2000  0.2500  0.0000
  Se  2.5500  1.1500  1.0133
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.6158]
_cell_length_b [7.7995]
_cell_length_c [9.3524]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Rb2H2Se2O]
_chemical_formula_sum '[Rb4 H4 Se4 O2]'
_cell_volume [336.6949]
_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  0.0000  0.5000  0.2510  1
  H  H1  4  0.0000  0.1245  0.0000  1
  Se  Se2  4  0.0000  0.1553  0.5000  1
  O  O3  2  0.0000  0.0000  0.0000  1
]