data_Hf2ZrHg
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.37
_cell_length_b   5.37
_cell_length_c   3.15
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   105.17
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Hf2ZrHg
_chemical_formula_sum   'Hf2 Zr1 Hg1'
_cell_volume   87.7
_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
  Hf  Hf0  1  0.63  0.13  0.58  1.0
  Hf  Hf1  1  0.63  0.87  0.58  1.0
  Zr  Zr3  1  0.0  0.0  0.0  1.0
  Hg  Hg2  1  0.26  0.0  0.0  1.0

data_Hf2ZrHg
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.15
_cell_length_b   5.37
_cell_length_c   5.37
_cell_angle_alpha   105.17
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Hf2ZrHg
_chemical_formula_sum   'Hf2 Zr1 Hg1'
_cell_volume   87.7
_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
  Hf  Hf0  1  0.58  0.63  0.13  1.0
  Hf  Hf1  1  0.58  0.63  0.87  1.0
  Zr  Zr2  1  0.0  0.0  0.0  1.0
  Hg  Hg3  1  0.0  0.26  0.0  1.0

Hf Hf Zr Hg
Hf Hf Zr Hg 0 1 o - o 2 3 o o o 