data_[Na10Hg4O8]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [17.1857]
_cell_length_b [3.5535]
_cell_length_c [6.4533]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.7711]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na5(HgO2)2]
_chemical_formula_sum '[Na10 Hg4 O8]'
_cell_volume [373.1398]
_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  0.1758  0.0000  0.9235  1
  Na  Na1  4  0.2097  0.5000  0.3475  1
  Na  Na2  2  0.0000  0.5000  0.0000  1
  Hg  Hg3  4  0.0859  0.0000  0.4826  1
  O  O4  4  0.0336  0.0000  0.7860  1
  O  O5  4  0.2177  0.5000  0.7207  1
]