data_[Na2Cd6Hg18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Cd  1.6900  1.5500  1.0900
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [5.9871]
_cell_length_b [15.0318]
_cell_length_c [8.1548]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.1421]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na(CdHg3)3]
_chemical_formula_sum '[Na2 Cd6 Hg18]'
_cell_volume [697.4177]
_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  0.0000  0.0000  0.0000  1
  Cd  Cd1  4  0.2500  0.2500  0.0000  1
  Cd  Cd2  2  0.0000  0.5000  0.5000  1
  Hg  Hg3  8  0.1009  0.3966  0.2040  1
  Hg  Hg4  8  0.1766  0.1778  0.3499  1
  Hg  Hg5  2  0.0000  0.0000  0.5000  1
]