data_[Rb4C4O10]
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 [C2/m]
_cell_length_a [12.6478]
_cell_length_b [4.5817]
_cell_length_c [5.6250]
_cell_angle_alpha [90.0000]
_cell_angle_beta [93.0889]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2C2O5]
_chemical_formula_sum '[Rb4 C4 O10]'
_cell_volume [325.4863]
_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  0.1437  0.5000  0.6664  1
  C  C1  4  0.1052  0.0000  0.1060  1
  O  O2  4  0.1124  0.0000  0.3301  1
  O  O3  4  0.1767  0.0000  0.9611  1
  O  O4  2  0.0000  0.0000  0.0000  1
]