data_[Si2Hg1Bi1S1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Hg  2.0000  1.5000  1.2450
  Bi  2.0200  1.6000  1.0350
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [5.4763]
_cell_length_b [5.4763]
_cell_length_c [5.6147]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Si2HgBiS]
_chemical_formula_sum '[Si2 Hg1 Bi1 S1]'
_cell_volume [168.3849]
_cell_formula_units_Z [1]
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
[
  Si  Si0  2  0.0000  0.5000  0.0000  1
  Hg  Hg1  1  0.0000  0.0000  0.5000  1
  Bi  Bi2  1  0.0000  0.0000  0.0000  1
  S  S3  1  0.5000  0.5000  0.5000  1
]