data_[Rb2Cu4Sb4Se12]
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
  Sb  2.0500  1.4500  0.8300
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.9107]
_cell_length_b [6.9576]
_cell_length_c [7.0214]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.6115]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [RbCu2(SbSe3)2]
_chemical_formula_sum '[Rb2 Cu4 Sb4 Se12]'
_cell_volume [774.7585]
_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  2  0.0000  0.5000  0.5000  1.0
  Cu  Cu1  4  0.1478  0.0000  0.0447  1.0
  Sb  Sb2  4  0.2089  0.0000  0.5532  1.0
  Se  Se3  8  0.1671  0.2559  0.2641  1.0
  Se  Se4  4  0.0779  0.0000  0.7430  1.0
]