data_NaHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.2
_cell_length_b   6.2
_cell_length_c   5.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   146.86
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaHg
_chemical_formula_sum   'Na2 Hg2'
_cell_volume   106.63
_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
  Na  Na2  1  0.77  0.88  0.27  1.0
  Na  Na3  1  0.77  0.12  0.81  1.0
  Hg  Hg0  1  0.77  0.03  0.27  1.0
  Hg  Hg1  1  0.77  0.97  0.81  1.0

data_NaHg
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.53
_cell_length_b   5.08
_cell_length_c   6.2
_cell_angle_alpha   90.0
_cell_angle_beta   106.57
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   NaHg
_chemical_formula_sum   'Na2 Hg2'
_cell_volume   106.63
_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
  Na  Na0  2  0.12  0.73  0.12  1.0
  Hg  Hg1  2  0.03  0.27  0.03  1.0

Na Na Hg Hg