data_Ar
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.58
_cell_length_b   3.58
_cell_length_c   11.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ar
_chemical_formula_sum   Ar4
_cell_volume   127.33
_cell_formula_units_Z   4
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
  Ar  Ar0  1  0.0  0.0  0.0  1.0
  Ar  Ar1  1  0.0  0.07  0.86  1.0
  Ar  Ar2  1  0.0  0.0  0.73  1.0
  Ar  Ar3  1  0.79  0.03  0.59  1.0

data_Ar
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.58
_cell_length_b   3.58
_cell_length_c   11.46
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ar
_chemical_formula_sum   Ar4
_cell_volume   127.33
_cell_formula_units_Z   4
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
  Ar  Ar0  1  0.0  0.0  0.0  1.0
  Ar  Ar1  1  0.0  0.07  0.86  1.0
  Ar  Ar2  1  0.0  0.0  0.73  1.0
  Ar  Ar3  1  0.79  0.03  0.59  1.0

Ar Ar Ar Ar
Ar Ar Ar Ar 0 1 o o - 1 2 o o o 2 3 - o o 