data_[Rb4Ba4O6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ba  0.8900  2.1500  1.4900
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.5078]
_cell_length_b [3.9728]
_cell_length_c [7.1487]
_cell_angle_alpha [90.0000]
_cell_angle_beta [99.9945]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Ba2O3]
_chemical_formula_sum '[Rb4 Ba4 O6]'
_cell_volume [377.7992]
_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  0.1467  0.0000  0.3712  1
  Ba  Ba1  4  0.1295  0.5000  0.9163  1
  O  O2  4  0.2384  0.0000  0.7784  1
  O  O3  2  0.0000  0.0000  0.0000  1
]