data_[Na4Hg6Sb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Hg  2.0000  1.5000  1.2450
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [11.6524]
_cell_length_b [5.1960]
_cell_length_c [6.7447]
_cell_angle_alpha [90.0000]
_cell_angle_beta [92.4083]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Hg3Sb2]
_chemical_formula_sum '[Na4 Hg6 Sb4]'
_cell_volume [408.0074]
_cell_formula_units_Z [2]
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  4  0.1018  0.5000  0.3066  1.0
  Hg  Hg1  4  0.2428  0.5000  0.8065  1.0
  Hg  Hg2  2  0.0000  0.0000  0.0000  1.0
  Sb  Sb3  4  0.1038  0.0000  0.6360  1.0
]