data_[Na6Hg4O8]
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 [P-1]
_cell_length_a [6.4476]
_cell_length_b [6.4625]
_cell_length_c [8.1835]
_cell_angle_alpha [71.3926]
_cell_angle_beta [71.5388]
_cell_angle_gamma [67.4682]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [Na3(HgO2)2]
_chemical_formula_sum '[Na6 Hg4 O8]'
_cell_volume [291.0404]
_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  2  0.2228  0.0332  0.0355  1
  Na  Na1  2  0.2727  0.7519  0.3800  1
  Na  Na2  2  0.3185  0.4054  0.1904  1
  Hg  Hg3  2  0.2004  0.5313  0.8006  1
  Hg  Hg4  2  0.2405  0.0401  0.6401  1
  O  O5  2  0.0140  0.7524  0.2038  1
  O  O6  2  0.0363  0.1804  0.3096  1
  O  O7  2  0.4576  0.2871  0.9115  1
  O  O8  2  0.4930  0.2422  0.4509  1
]