data_[Na15Ga6Hg15]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  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 [5.0575]
_cell_length_b [5.0575]
_cell_length_c [40.1673]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Na5Ga2Hg5]
_chemical_formula_sum '[Na15 Ga6 Hg15]'
_cell_volume [889.7613]
_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  6  0.0000  0.0000  0.2241  1
  Na  Na1  6  0.0000  0.0000  0.3054  1
  Na  Na2  3  -0.0000  -0.0000  0.5000  1
  Ga  Ga3  6  0.0000  0.0000  0.0702  1
  Hg  Hg4  6  0.0000  0.0000  0.1428  1
  Hg  Hg5  6  0.0000  0.0000  0.4023  1
  Hg  Hg6  3  0.0000  0.0000  0.0000  1
]