data_[Si2Ag4Hg2S8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  Ag  1.9300  1.6000  1.0867
  Hg  2.0000  1.5000  1.2450
  S  2.5800  1.0000  0.8800
]
_symmetry_space_group_name_H-M [I-42m]
_cell_length_a [5.6394]
_cell_length_b [5.6394]
_cell_length_c [11.6206]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [121]
_chemical_formula_structural [SiAg2HgS4]
_chemical_formula_sum '[Si2 Ag4 Hg2 S8]'
_cell_volume [369.5716]
_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
[
  Si  Si0  2  0.0000  0.0000  0.0000  1.0
  Ag  Ag1  4  0.0000  0.5000  0.2500  1.0
  Hg  Hg2  2  0.0000  0.0000  0.5000  1.0
  S  S3  8  0.2147  0.2147  0.8869  1.0
]