data_[Rb4Ce8Cu12O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ce  1.1200  1.8500  1.0800
  Cu  1.9000  1.3500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [3.5829]
_cell_length_b [12.0527]
_cell_length_c [15.3636]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [RbCe2Cu3O5]
_chemical_formula_sum '[Rb4 Ce8 Cu12 O20]'
_cell_volume [663.4497]
_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  0.4189  0.2500  1
  Ce  Ce1  8  0.0000  0.3178  0.5961  1
  Cu  Cu2  8  0.0000  0.0732  0.5642  1
  Cu  Cu3  4  0.0000  0.1503  0.2500  1
  O  O4  8  0.0000  0.0616  0.1315  1
  O  O5  8  0.0000  0.3280  0.0633  1
  O  O6  4  0.0000  0.2677  0.7500  1
]