data_Hg2Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.28
_cell_length_b   6.28
_cell_length_c   7.8
_cell_angle_alpha   115.7
_cell_angle_beta   115.7
_cell_angle_gamma   42.39
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Hg2Cl
_chemical_formula_sum   'Hg4 Cl2'
_cell_volume   183.33
_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
  Hg  Hg2  1  0.79  0.0  0.57  1.0
  Hg  Hg3  1  0.73  0.0  0.15  1.0
  Hg  Hg4  1  0.35  0.0  0.75  1.0
  Hg  Hg5  1  0.29  0.0  0.33  1.0
  Cl  Cl0  1  0.84  0.0  0.17  1.0
  Cl  Cl1  1  0.24  0.0  0.73  1.0

data_Hg2Cl
_symmetry_space_group_name_H-M   P-1
_cell_length_a   4.54
_cell_length_b   6.28
_cell_length_c   7.6
_cell_angle_alpha   67.6
_cell_angle_beta   72.63
_cell_angle_gamma   68.81
_symmetry_Int_Tables_number   2
_chemical_formula_structural   Hg2Cl
_chemical_formula_sum   'Hg4 Cl2'
_cell_volume   183.33
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Hg  Hg0  2  0.0  0.13  0.12  1.0
  Hg  Hg1  2  0.0  0.49  0.7  1.0
  Cl  Cl2  2  0.0  0.43  0.28  1.0

Hg Hg Hg Hg Cl Cl