data_[Na4V4Hg4O16]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  V  1.6300  1.3500  0.7775
  Hg  2.0000  1.5000  1.2450
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [6.3461]
_cell_length_b [9.0639]
_cell_length_c [7.3772]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [NaVHgO4]
_chemical_formula_sum '[Na4 V4 Hg4 O16]'
_cell_volume [424.3363]
_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
[
  Na  Na0  4  0.0000  0.1808  0.7500  1.0
  V  V1  4  0.0000  0.1599  0.2500  1.0
  Hg  Hg2  4  0.0000  0.5000  0.0000  1.0
  O  O3  8  0.0000  0.2677  0.0516  1.0
  O  O4  8  0.2198  0.0457  0.2500  1.0
]