data_[Rb4Ag8Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [7.1145]
_cell_length_b [12.1833]
_cell_length_c [7.3279]
_cell_angle_alpha [90.0000]
_cell_angle_beta [113.2547]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Rb(AgSe)2]
_chemical_formula_sum '[Rb4 Ag8 Se8]'
_cell_volume [583.5703]
_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  0.1234  0.7500  1.0
  Ag  Ag1  4  0.0000  0.2489  0.2500  1.0
  Ag  Ag2  4  0.0000  0.4478  0.7500  1.0
  Se  Se3  8  0.1995  0.3884  0.5407  1.0
]