data_[Cu4Hg2Ge2Te8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cu  1.9000  1.3500  0.8200
  Hg  2.0000  1.5000  1.2450
  Ge  2.0100  1.2500  0.7700
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [I-42m]
_cell_length_a [6.2558]
_cell_length_b [6.2558]
_cell_length_c [12.0907]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [121]
_chemical_formula_structural [Cu2HgGeTe4]
_chemical_formula_sum '[Cu4 Hg2 Ge2 Te8]'
_cell_volume [473.1708]
_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
[
  Cu  Cu0  4  0.0000  0.5000  0.2500  1.0
  Hg  Hg1  2  0.0000  0.0000  0.0000  1.0
  Ge  Ge2  2  0.0000  0.0000  0.5000  1.0
  Te  Te3  8  0.2358  0.2358  0.6391  1.0
]