data_[In18Hg21]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  In  1.7800  1.5500  0.9400
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [6.1421]
_cell_length_b [6.1421]
_cell_length_c [33.2801]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [In6Hg7]
_chemical_formula_sum '[In18 Hg21]'
_cell_volume [1087.2962]
_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
[
  In  In0  6  0.0000  0.0000  0.0459  1.0
  In  In1  6  0.0000  0.0000  0.1519  1.0
  In  In2  6  0.0000  0.0000  0.3345  1.0
  Hg  Hg3  18  0.0028  0.5014  0.9136  1.0
  Hg  Hg4  3  -0.0000  -0.0000  0.5000  1.0
]