data_[Rb8Sn12Sb20]
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
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [12.0513]
_cell_length_b [14.7078]
_cell_length_c [8.2913]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Rb2Sn3Sb5]
_chemical_formula_sum '[Rb8 Sn12 Sb20]'
_cell_volume [1469.6151]
_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  8  0.2498  0.1277  0.0000  1
  Sn  Sn1  8  0.1155  0.3784  0.0000  1
  Sn  Sn2  4  0.0000  0.0000  0.2500  1
  Sb  Sb3  8  0.0000  0.2552  0.2500  1
  Sb  Sb4  8  0.1055  0.1270  0.5000  1
  Sb  Sb5  4  0.0000  0.5000  0.2500  1
]