data_[Rb4Sb4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sb  2.0500  1.4500  0.8300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pbcm]
_cell_length_a [7.4543]
_cell_length_b [7.7670]
_cell_length_c [5.7525]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [57]
_chemical_formula_structural [RbSbO2]
_chemical_formula_sum '[Rb4 Sb4 O8]'
_cell_volume [333.0554]
_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  0.3799  0.0903  0.2500  1
  Sb  Sb1  4  0.1160  0.6161  0.2500  1
  O  O2  4  0.2456  0.7500  0.0000  1
  O  O3  4  0.2774  0.0733  0.7500  1
]