data_[Y21Zn3I36]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Y  1.2200  1.8000  1.0400
  Zn  1.6500  1.3500  0.8800
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [R-3]
_cell_length_a [15.7112]
_cell_length_b [15.7112]
_cell_length_c [10.4844]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [148]
_chemical_formula_structural [Y7ZnI12]
_chemical_formula_sum '[Y21 Zn3 I36]'
_cell_volume [2241.2644]
_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
[
  Y  Y0  18  0.0458  0.8837  0.8479  1
  Y  Y1  3  0.0000  0.0000  0.5000  1
  Zn  Zn2  3  0.0000  0.0000  0.0000  1
  I  I3  18  0.0211  0.4352  0.6631  1
  I  I4  18  0.0519  0.8678  0.3394  1
]