data_ZnHgPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.77
_cell_length_b   7.45
_cell_length_c   3.42
_cell_angle_alpha   82.26
_cell_angle_beta   71.9
_cell_angle_gamma   25.84
_symmetry_Int_Tables_number   1
_chemical_formula_structural   ZnHgPb
_chemical_formula_sum   'Zn1 Hg1 Pb1'
_cell_volume   76.76
_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
  Zn  Zn2  1  0.85  0.87  0.91  1.0
  Hg  Hg0  1  0.85  0.87  0.22  1.0
  Pb  Pb1  1  0.85  0.87  0.73  1.0

data_ZnHgPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.7
_cell_length_b   14.43
_cell_length_c   3.42
_cell_angle_alpha   90.0
_cell_angle_beta   122.82
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   ZnHgPb
_chemical_formula_sum   'Zn2 Hg2 Pb2'
_cell_volume   153.52
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Zn  Zn0  2  0.35  0.5  0.76  1.0
  Hg  Hg1  2  0.35  0.5  0.08  1.0
  Pb  Pb2  2  0.35  0.5  0.58  1.0

Zn Hg Pb
Zn Hg Pb 0 2 o o o 0 1 o o + 