data_[Sn3Hg3Cl6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sn  1.9600  1.4500  0.8300
  Hg  2.0000  1.5000  1.2450
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [R3m]
_cell_length_a [4.2596]
_cell_length_b [4.2596]
_cell_length_c [29.1977]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [160]
_chemical_formula_structural [SnHgCl2]
_chemical_formula_sum '[Sn3 Hg3 Cl6]'
_cell_volume [458.7854]
_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
[
  Sn  Sn0  3  0.0000  0.0000  0.6665  1
  Hg  Hg1  3  0.0000  0.0000  0.5004  1
  Cl  Cl2  3  0.0000  0.0000  0.0516  1
  Cl  Cl3  3  0.0000  0.0000  0.2815  1
]