data_[Sr3Ag6Pb3I18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Ag  1.9300  1.6000  1.0867
  Pb  2.3300  1.8000  1.1225
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [8.1242]
_cell_length_b [8.1242]
_cell_length_c [22.9757]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [SrAg2PbI6]
_chemical_formula_sum '[Sr3 Ag6 Pb3 I18]'
_cell_volume [1313.2822]
_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
[
  Sr  Sr0  3  -0.0000  0.0000  0.0000  1.0
  Ag  Ag1  6  0.0000  0.0000  0.2500  1.0
  Pb  Pb2  3  0.0000  0.0000  0.5000  1.0
  I  I3  18  0.0010  0.3423  0.2469  1.0
]