data_[Na4Sr2Hg2Bi4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Hg  2.0000  1.5000  1.2450
  Bi  2.0200  1.6000  1.0350
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.8946]
_cell_length_b [9.4708]
_cell_length_c [8.3361]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Na2SrHgBi2]
_chemical_formula_sum '[Na4 Sr2 Hg2 Bi4]'
_cell_volume [386.4252]
_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  0.1714  0.3643  1.0
  Na  Na1  2  0.5000  0.0730  0.0398  1.0
  Sr  Sr2  2  0.0000  0.4450  0.9827  1.0
  Hg  Hg3  2  0.5000  0.3136  0.6442  1.0
  Bi  Bi4  2  0.0000  0.1496  0.7484  1.0
  Bi  Bi5  2  0.5000  0.3715  0.2663  1.0
]