data_[Rb8U4Cu4S20]
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
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.0043]
_cell_length_b [19.7637]
_cell_length_c [13.5914]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Rb2UCuS5]
_chemical_formula_sum '[Rb8 U4 Cu4 S20]'
_cell_volume [1075.6034]
_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  0.1152  0.6866  1
  Rb  Rb1  4  0.0000  0.1197  0.3183  1
  U  U2  4  0.0000  0.2057  0.0153  1
  Cu  Cu3  4  0.0000  0.4152  0.4340  1
  S  S4  4  0.0000  0.0785  0.0238  1
  S  S5  4  0.0000  0.2929  0.6392  1
  S  S6  4  0.0000  0.2995  0.3894  1
  S  S7  4  0.0000  0.3284  0.0053  1
  S  S8  4  0.0000  0.4866  0.3120  1
]