data_[Na3Mg6Ga3Hg12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  Ga  1.8100  1.3000  0.7600
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [5.0373]
_cell_length_b [5.0373]
_cell_length_c [25.0354]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [NaMg2GaHg4]
_chemical_formula_sum '[Na3 Mg6 Ga3 Hg12]'
_cell_volume [550.1434]
_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
[
  Na  Na0  3  0.0000  0.0000  0.0000  1.0
  Mg  Mg1  6  0.0000  0.0000  0.2477  1.0
  Ga  Ga2  3  -0.0000  -0.0000  0.5000  1.0
  Hg  Hg3  6  0.0000  0.0000  0.1257  1.0
  Hg  Hg4  6  0.0000  0.0000  0.3765  1.0
]