data_Na2Al
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.48
_cell_length_b   6.48
_cell_length_c   8.08
_cell_angle_alpha   106.27
_cell_angle_beta   106.27
_cell_angle_gamma   28.36
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2Al
_chemical_formula_sum   'Na4 Al2'
_cell_volume   154.32
_cell_formula_units_Z   2
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
  Na  Na2  1  0.67  0.0  0.17  1.0
  Na  Na3  1  0.19  0.0  0.13  1.0
  Na  Na4  1  0.42  0.0  0.69  1.0
  Na  Na5  1  0.81  0.0  0.41  1.0
  Al  Al0  1  0.07  0.0  0.17  1.0
  Al  Al1  1  0.45  0.0  0.37  1.0

data_Na2Al
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.17
_cell_length_b   6.48
_cell_length_c   8.08
_cell_angle_alpha   106.27
_cell_angle_beta   90.0
_cell_angle_gamma   104.18
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2Al
_chemical_formula_sum   'Na4 Al2'
_cell_volume   154.32
_cell_formula_units_Z   2
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
  Na  Na0  1  0.0  0.19  0.59  1.0
  Na  Na1  1  0.0  0.33  0.83  1.0
  Na  Na2  1  0.0  0.58  0.31  1.0
  Na  Na3  1  0.0  0.81  0.87  1.0
  Al  Al4  1  0.0  0.55  0.63  1.0
  Al  Al5  1  0.0  0.93  0.83  1.0

Na Na Na Na Al Al