data_[Hg4N4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Hg  2.0000  1.5000  1.2450
  N  3.0400  0.6500  0.6300
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [4.7211]
_cell_length_b [10.7675]
_cell_length_c [6.6789]
_cell_angle_alpha [90.0000]
_cell_angle_beta [110.4241]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [HgNO2]
_chemical_formula_sum '[Hg4 N4 O8]'
_cell_volume [318.1733]
_cell_formula_units_Z [4]
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
[
  Hg  Hg0  4  0.1493  0.0851  0.1369  1.0
  N  N1  4  0.3438  0.7118  0.0435  1.0
  O  O2  4  0.2762  0.6100  0.1023  1.0
  O  O3  4  0.3779  0.2435  0.3751  1.0
]