data_[Rb4U4Cu4O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  U  1.3800  1.7500  0.9913
  Cu  1.9000  1.3500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [8.5145]
_cell_length_b [10.3528]
_cell_length_c [6.2339]
_cell_angle_alpha [90.0000]
_cell_angle_beta [119.0133]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [RbUCuO5]
_chemical_formula_sum '[Rb4 U4 Cu4 O20]'
_cell_volume [480.5531]
_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  0.0934  0.7500  1
  U  U1  4  0.2500  0.2500  0.5000  1
  Cu  Cu2  4  0.0000  0.4503  0.7500  1
  O  O3  8  0.1474  0.3258  0.7113  1
  O  O4  8  0.1756  0.4229  0.3103  1
  O  O5  4  0.0000  0.1657  0.2500  1
]