data_HfAlSi2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.77
_cell_length_b   4.04
_cell_length_c   4.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfAlSi2
_chemical_formula_sum   'Hf1 Al1 Si2'
_cell_volume   64.48
_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  Hf1  1  0.0  0.02  0.12  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Si  Si2  1  0.89  0.02  0.0  1.0
  Si  Si3  1  0.89  0.0  0.12  1.0

data_HfAlSi2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.77
_cell_length_b   4.04
_cell_length_c   4.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   HfAlSi2
_chemical_formula_sum   'Hf1 Al1 Si2'
_cell_volume   64.48
_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  0.0  0.02  0.12  1.0
  Al  Al1  1  0.0  0.0  0.0  1.0
  Si  Si2  1  0.89  0.0  0.12  1.0
  Si  Si3  1  0.89  0.02  -0.0  1.0

Hf Al Si Si
Hf Al Si Si 0 3 - o o 0 1 o o o 1 2 - o o 2 3 o o o 