data_[Rb4Cu4Ru2S8]
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
  Ru  2.2000  1.3000  0.6610
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [P4_2/mcm]
_cell_length_a [5.7360]
_cell_length_b [5.7360]
_cell_length_c [12.8968]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [132]
_chemical_formula_structural [Rb2Cu2RuS4]
_chemical_formula_sum '[Rb4 Cu4 Ru2 S8]'
_cell_volume [424.3244]
_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  0.2442  0.2442  0.0000  1
  Cu  Cu1  4  0.0000  0.5000  0.2500  1
  Ru  Ru2  2  0.5000  0.5000  0.2500  1
  S  S3  8  0.2615  0.2615  0.3424  1
]