data_[Ni6Hg3I3O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ni  1.9100  1.3500  0.7400
  Hg  2.0000  1.5000  1.2450
  I  2.6600  1.4000  1.2733
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.4238]
_cell_length_b [5.4238]
_cell_length_c [14.4244]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Ni2HgIO6]
_chemical_formula_sum '[Ni6 Hg3 I3 O18]'
_cell_volume [367.4820]
_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
[
  Ni  Ni0  3  0.0000  0.0000  0.4754  1
  Ni  Ni1  3  0.0000  0.0000  0.9918  1
  Hg  Hg2  3  0.0000  0.0000  0.2095  1
  I  I3  3  0.0000  0.0000  0.6799  1
  O  O4  9  0.0038  0.3259  0.0748  1
  O  O5  9  0.0336  0.6171  0.2538  1
]