data_[Rb2Na2Sn2I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Na  0.9300  1.8000  1.1600
  Sn  1.9600  1.4500  0.8300
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [8.7104]
_cell_length_b [8.9052]
_cell_length_c [9.6772]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.4993]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [RbNaSnI4]
_chemical_formula_sum '[Rb2 Na2 Sn2 I8]'
_cell_volume [729.8990]
_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  0.1715  0.2500  0.0298  1.0
  Na  Na1  2  0.2891  0.7500  0.3520  1.0
  Sn  Sn2  2  0.1877  0.2500  0.5189  1.0
  I  I3  4  0.0262  0.5050  0.2863  1.0
  I  I4  2  0.4443  0.2500  0.8034  1.0
  I  I5  2  0.4553  0.2500  0.3708  1.0
]