data_[Rb2Ba2Sn8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ba  0.8900  2.1500  1.4900
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Imm2]
_cell_length_a [4.9475]
_cell_length_b [8.2735]
_cell_length_c [10.3270]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [RbBaSn4]
_chemical_formula_sum '[Rb2 Ba2 Sn8]'
_cell_volume [422.7227]
_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  0.0000  0.0000  0.4349  1
  Ba  Ba1  2  0.0000  0.5000  0.5627  1
  Sn  Sn2  4  0.0000  0.1835  0.8376  1
  Sn  Sn3  4  0.0000  0.3173  0.1636  1
]