data_[Na2Hg4Sb2Pb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Hg  2.0000  1.5000  1.2450
  Sb  2.0500  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.5076]
_cell_length_b [10.6136]
_cell_length_c [7.2601]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [NaHg2SbPb2]
_chemical_formula_sum '[Na2 Hg4 Sb2 Pb4]'
_cell_volume [347.3327]
_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  0.4897  0.8748  1.0
  Hg  Hg1  2  0.0000  0.1779  0.9050  1.0
  Hg  Hg2  2  0.5000  0.3628  0.1259  1.0
  Sb  Sb3  2  0.5000  0.3096  0.6389  1.0
  Pb  Pb4  2  0.0000  0.1869  0.3794  1.0
  Pb  Pb5  2  0.5000  0.0060  0.6217  1.0
]