data_[Rb2Ta2Ag2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ta  1.5000  1.4500  0.8200
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [6.1789]
_cell_length_b [7.6612]
_cell_length_c [10.2120]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.1306]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbTaAgSe4]
_chemical_formula_sum '[Rb2 Ta2 Ag2 Se8]'
_cell_volume [464.3848]
_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  0.3473  0.2500  0.1442  1.0
  Ta  Ta1  2  0.1343  0.7500  0.2672  1.0
  Ag  Ag2  2  0.3597  0.2500  0.7242  1.0
  Se  Se3  4  0.0854  0.5116  0.7349  1.0
  Se  Se4  2  0.2697  0.7500  0.0642  1.0
  Se  Se5  2  0.4455  0.7500  0.4729  1.0
]