data_HfZr
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.17
_cell_length_b   3.17
_cell_length_c   4.53
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfZr
_chemical_formula_sum   'Hf1 Zr1'
_cell_volume   45.58
_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  0.59  0.59  0.26  1.0
  Zr  Zr1  1  0.0  0.0  0.0  1.0

data_HfZr
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.49
_cell_length_b   4.49
_cell_length_c   4.53
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   HfZr
_chemical_formula_sum   'Hf2 Zr2'
_cell_volume   91.16
_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+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.09  0.5  0.26  1.0
  Zr  Zr1  2  0.0  0.0  0.0  1.0

Hf Zr
Hf Zr 0 1 o + o 0 1 + o o 0 1 + + o 