data_[Rb6N2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [8.2877]
_cell_length_b [6.3270]
_cell_length_c [6.0016]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Rb3NO4]
_chemical_formula_sum '[Rb6 N2 O8]'
_cell_volume [314.7067]
_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  0.2221  0.6561  0.0156  1.0
  Rb  Rb1  2  0.0000  0.9423  0.4829  1.0
  N  N2  2  0.0000  0.1877  0.0000  1.0
  O  O3  4  0.1386  0.2341  0.1260  1.0
  O  O4  2  0.0000  0.3123  0.8029  1.0
  O  O5  2  0.0000  0.9741  0.9464  1.0
]