data_[Rb6Cr3Ag3I18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cr  1.6600  1.4000  0.9400
  Ag  1.9300  1.6000  1.0867
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [8.3956]
_cell_length_b [8.3956]
_cell_length_c [20.9252]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Rb2CrAgI6]
_chemical_formula_sum '[Rb6 Cr3 Ag3 I18]'
_cell_volume [1277.3333]
_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  0.4408  1.0
  Rb  Rb1  3  0.0000  0.0000  0.9489  1.0
  Cr  Cr2  3  0.0000  0.0000  0.6761  1.0
  Ag  Ag3  3  0.0000  0.0000  0.2617  1.0
  I  I4  9  0.0299  0.4563  0.4140  1.0
  I  I5  9  0.1188  0.7464  0.2562  1.0
]