data_[Rb4Al2I10]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Al  1.6100  1.2500  0.6750
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [I4mm]
_cell_length_a [8.5992]
_cell_length_b [8.5992]
_cell_length_c [10.5898]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [Rb2AlI5]
_chemical_formula_sum '[Rb4 Al2 I10]'
_cell_volume [783.0676]
_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  0.5000  0.2396  1.0
  Al  Al1  2  0.0000  0.0000  0.0362  1.0
  I  I2  8  0.2207  0.2207  0.9820  1.0
  I  I3  2  0.0000  0.0000  0.2795  1.0
]