data_[Rb4Cu36Si16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cu  1.9000  1.3500  0.8200
  Si  1.9000  1.1000  0.5400
]
_symmetry_space_group_name_H-M [I4/mcm]
_cell_length_a [8.2125]
_cell_length_b [8.2125]
_cell_length_c [11.7945]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [140]
_chemical_formula_structural [RbCu9Si4]
_chemical_formula_sum '[Rb4 Cu36 Si16]'
_cell_volume [795.4843]
_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  0.0000  0.2500  1
  Cu  Cu1  16  0.0651  0.2059  0.0000  1
  Cu  Cu2  16  0.1229  0.3771  0.1832  1
  Si  Si3  16  0.1758  0.3242  0.3850  1
  Cu  Cu4  4  0.0000  0.5000  0.0000  1
]