data_[K2Ag2Hg2Br8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ag  1.9300  1.6000  1.0867
  Hg  2.0000  1.5000  1.2450
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.2306]
_cell_length_b [7.8269]
_cell_length_c [8.9178]
_cell_angle_alpha [90.0000]
_cell_angle_beta [102.1711]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [KAgHgBr4]
_chemical_formula_sum '[K2 Ag2 Hg2 Br8]'
_cell_volume [493.3399]
_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
[
  K  K0  2  0.2205  0.2500  0.0650  1.0
  Ag  Ag1  2  0.2891  0.2500  0.6700  1.0
  Hg  Hg2  2  0.2165  0.7500  0.3448  1.0
  Br  Br3  4  0.0420  0.0010  0.7347  1.0
  Br  Br4  2  0.3941  0.7500  0.0935  1.0
  Br  Br5  2  0.4780  0.2500  0.4386  1.0
]