data_Al2SiCl
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.2
_cell_length_b   3.2
_cell_length_c   7.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Al2SiCl
_chemical_formula_sum   'Al2 Si1 Cl1'
_cell_volume   72.57
_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
  Al  Al0  1  0.6  0.6  0.48  1.0
  Al  Al1  1  0.6  0.6  0.6  1.0
  Si  Si3  1  0.0  0.0  0.0  1.0
  Cl  Cl2  1  0.0  0.0  0.54  1.0

data_Al2SiCl
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.53
_cell_length_b   4.53
_cell_length_c   7.08
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Al2SiCl
_chemical_formula_sum   'Al4 Si2 Cl2'
_cell_volume   145.15
_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
  Al  Al0  2  0.1  0.5  0.48  1.0
  Al  Al1  2  0.1  0.5  0.6  1.0
  Si  Si2  2  0.0  0.0  0.0  1.0
  Cl  Cl3  2  0.0  0.0  0.54  1.0

Al Al Si Cl
Al Al Si Cl 0 1 o o o 0 2 + + o 0 3 + + o 1 2 + + + 1 2 + o + 1 2 o + + 1 2 o o + 1 3 + + o 2 2 + o o 2 2 o + o 2 3 o o - 2 3 o o o 