data_[Rb4Nb2Ag4Te8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Nb  1.6000  1.4500  0.8200
  Ag  1.9300  1.6000  1.0867
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [C222]
_cell_length_a [6.4993]
_cell_length_b [14.9924]
_cell_length_c [6.4802]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [21]
_chemical_formula_structural [Rb2Nb(AgTe2)2]
_chemical_formula_sum '[Rb4 Nb2 Ag4 Te8]'
_cell_volume [631.4266]
_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  0.2500  0.2500  0.7446  1
  Nb  Nb1  2  0.0000  0.0000  0.0000  1
  Ag  Ag2  2  0.0000  0.0000  0.5000  1
  Ag  Ag3  2  0.0000  0.5000  0.0000  1
  Te  Te4  8  0.2346  0.1102  0.2348  1
]