data_[Rb6Al3Ag3I18]
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
  Ag  1.9300  1.6000  1.0867
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [8.4232]
_cell_length_b [8.4232]
_cell_length_c [21.3171]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Rb2AlAgI6]
_chemical_formula_sum '[Rb6 Al3 Ag3 I18]'
_cell_volume [1309.8092]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.4433  1.0
  Rb  Rb1  3  0.0000  0.0000  0.9464  1.0
  Al  Al2  3  0.0000  0.0000  0.6835  1.0
  Ag  Ag3  3  0.0000  0.0000  0.2606  1.0
  I  I4  9  0.0234  0.4513  0.4125  1.0
  I  I5  9  0.1191  0.7478  0.2562  1.0
]