data_[Na14Cd4Hg4]
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 [Imm2]
_cell_length_a [3.3782]
_cell_length_b [18.5823]
_cell_length_c [10.6741]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [44]
_chemical_formula_structural [Na7(CdHg)2]
_chemical_formula_sum '[Na14 Cd4 Hg4]'
_cell_volume [670.0671]
_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  4  0.0000  0.1527  0.7195  1.0
  Na  Na1  4  0.0000  0.1681  0.1212  1.0
  Na  Na2  4  0.0000  0.4011  0.9128  1.0
  Na  Na3  2  0.0000  0.5000  0.4492  1.0
  Cd  Cd4  2  0.0000  0.0000  0.2093  1.0
  Cd  Cd5  2  0.0000  0.5000  0.1560  1.0
  Hg  Hg6  4  0.0000  0.2449  0.4122  1.0
]