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 [C2/c]
_cell_length_a [8.1193]
_cell_length_b [9.3981]
_cell_length_c [5.6769]
_cell_angle_alpha [90.0000]
_cell_angle_beta [123.7736]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [RbSbO2]
_chemical_formula_sum '[Rb4 Sb4 O8]'
_cell_volume [360.0763]
_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  0.0000  0.3572  0.2500  1.0
  Sb  Sb1  4  0.0000  0.0849  0.7500  1.0
  O  O2  8  0.1772  0.0470  0.2124  1.0
]