data_[Rb4Na4O4]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pnma]
_cell_length_a [6.9891]
_cell_length_b [4.0109]
_cell_length_c [8.5861]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [62]
_chemical_formula_structural [RbNaO]
_chemical_formula_sum '[Rb4 Na4 O4]'
_cell_volume [240.6898]
_cell_formula_units_Z [4]
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  0.0087  0.2500  0.1775  1.0
  Na  Na1  4  0.1287  0.2500  0.5392  1.0
  O  O2  4  0.2090  0.7500  0.4211  1.0
]