data_[Na4Mg8Cd4Hg20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  Cd  1.6900  1.5500  1.0900
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [3.3553]
_cell_length_b [16.8291]
_cell_length_c [15.7305]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [NaMg2CdHg5]
_chemical_formula_sum '[Na4 Mg8 Cd4 Hg20]'
_cell_volume [888.2365]
_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  0.4624  0.4202  1.0
  Mg  Mg1  4  0.0000  0.0770  0.6980  1.0
  Mg  Mg2  4  0.0000  0.1539  0.3852  1.0
  Cd  Cd3  4  0.0000  0.2099  0.9734  1.0
  Hg  Hg4  4  0.0000  0.0669  0.0859  1.0
  Hg  Hg5  4  0.0000  0.2690  0.6534  1.0
  Hg  Hg6  4  0.0000  0.3125  0.3038  1.0
  Hg  Hg7  4  0.0000  0.3826  0.0434  1.0
  Hg  Hg8  4  0.0000  0.4328  0.7609  1.0
]