data_[Rb6Sn8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.7108]
_cell_length_b [5.9582]
_cell_length_c [22.0490]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Rb3Sn4]
_chemical_formula_sum '[Rb6 Sn8]'
_cell_volume [618.8719]
_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  0.0000  0.0000  0.1841  1.0
  Rb  Rb1  2  0.0000  0.5000  0.5000  1.0
  Sn  Sn2  4  0.0000  0.0000  0.3617  1.0
  Sn  Sn3  4  0.0000  0.5000  0.0640  1.0
]