data_[Rb4C4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  C  2.5500  0.7000  0.3000
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [6.9845]
_cell_length_b [6.7967]
_cell_length_c [6.5120]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.2423]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [RbCO2]
_chemical_formula_sum '[Rb4 C4 O8]'
_cell_volume [284.0491]
_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  0.2191  0.0396  0.3388  1.0
  C  C1  4  0.4016  0.5422  0.3997  1.0
  O  O2  4  0.2241  0.0306  0.8686  1.0
  O  O3  4  0.4342  0.6760  0.2815  1.0
]