data_[Rb6Al3Ag3Br18]
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
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [7.8694]
_cell_length_b [7.8694]
_cell_length_c [19.4683]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Rb2AlAgBr6]
_chemical_formula_sum '[Rb6 Al3 Ag3 Br18]'
_cell_volume [1044.0953]
_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  0.4429  1.0
  Rb  Rb1  3  0.0000  0.0000  0.9393  1.0
  Al  Al2  3  0.0000  0.0000  0.6845  1.0
  Ag  Ag3  3  0.0000  0.0000  0.2552  1.0
  Br  Br4  9  0.0306  0.4608  0.4137  1.0
  Br  Br5  9  0.1279  0.7496  0.2587  1.0
]