data_Na2CoHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.64
_cell_length_b   5.64
_cell_length_c   5.64
_cell_angle_alpha   144.36
_cell_angle_beta   126.03
_cell_angle_gamma   66.37
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2CoHg
_chemical_formula_sum   'Na2 Co1 Hg1'
_cell_volume   83.41
_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  Na2  1  0.0  0.0  0.39  1.0
  Na  Na3  1  0.73  0.0  0.48  1.0
  Co  Co0  1  0.0  0.0  0.9  1.0
  Hg  Hg1  1  0.0  0.56  0.12  1.0

data_Na2CoHg
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.45
_cell_length_b   5.12
_cell_length_c   5.64
_cell_angle_alpha   116.99
_cell_angle_beta   107.82
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2CoHg
_chemical_formula_sum   'Na2 Co1 Hg1'
_cell_volume   83.41
_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  Na0  1  0.0  0.39  0.39  1.0
  Na  Na1  1  0.0  0.48  0.75  1.0
  Co  Co2  1  0.0  0.9  0.9  1.0
  Hg  Hg3  1  0.44  0.56  0.56  1.0

Na Na Co Hg