data_NaHg2Cl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.17
_cell_length_b   4.17
_cell_length_c   6.78
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.81
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaHg2Cl
_chemical_formula_sum   'Na1 Hg2 Cl1'
_cell_volume   117.76
_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
  Na  Na3  1  0.0  0.0  0.0  1.0
  Hg  Hg1  1  0.93  0.47  0.39  1.0
  Hg  Hg2  1  0.93  0.53  0.39  1.0
  Cl  Cl0  1  0.93  0.0  0.0  1.0

data_NaHg2Cl
_symmetry_space_group_name_H-M   Pm
_cell_length_a   4.17
_cell_length_b   4.17
_cell_length_c   6.78
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   6
_chemical_formula_structural   NaHg2Cl
_chemical_formula_sum   'Na1 Hg2 Cl1'
_cell_volume   117.77
_cell_formula_units_Z   1
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
  Na  Na0  1  0.0  0.0  0.0  1.0
  Hg  Hg1  2  0.93  0.47  0.39  1.0
  Cl  Cl2  1  0.93  0.0  -0.0  1.0

Na Hg Hg Cl