data_[Na16Tl4Hg2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [9.0500]
_cell_length_b [15.2015]
_cell_length_c [5.8388]
_cell_angle_alpha [90.0000]
_cell_angle_beta [117.8751]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na8Tl2Hg]
_chemical_formula_sum '[Na16 Tl4 Hg2]'
_cell_volume [710.0610]
_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  8  0.2099  0.1178  0.1283  1.0
  Na  Na1  4  0.0000  0.2107  0.5000  1.0
  Na  Na2  4  0.1191  0.5000  0.3060  1.0
  Tl  Tl3  4  0.0000  0.3088  0.0000  1.0
  Hg  Hg4  2  0.0000  0.0000  0.5000  1.0
]