data_MgTaHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.1
_cell_length_b   7.08
_cell_length_c   2.94
_cell_angle_alpha   78.46
_cell_angle_beta   77.57
_cell_angle_gamma   23.97
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgTaHg
_chemical_formula_sum   'Mg1 Ta1 Hg1'
_cell_volume   58.69
_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
  Mg  Mg1  1  0.04  0.12  0.06  1.0
  Ta  Ta2  1  0.04  0.12  0.51  1.0
  Hg  Hg0  1  0.04  0.12  0.54  1.0

data_MgTaHg
_symmetry_space_group_name_H-M   Imm2
_cell_length_a   2.94
_cell_length_b   13.55
_cell_length_c   2.94
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   44
_chemical_formula_structural   MgTaHg
_chemical_formula_sum   'Mg2 Ta2 Hg2'
_cell_volume   117.47
_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, y, z'
  4  'x, -y, z'
  5  'x+1/2, y+1/2, z+1/2'
  6  '-x+1/2, -y+1/2, z+1/2'
  7  '-x+1/2, y+1/2, z+1/2'
  8  'x+1/2, -y+1/2, z+1/2'
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
  Mg  Mg0  2  0.0  0.5  0.18  1.0
  Ta  Ta1  2  0.0  0.5  0.63  1.0
  Hg  Hg2  2  0.0  0.5  0.66  1.0

Mg Ta Hg