data_Na2LiSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.85
_cell_length_b   4.18
_cell_length_c   7.68
_cell_angle_alpha   90.0
_cell_angle_beta   94.03
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2LiSi
_chemical_formula_sum   'Na2 Li1 Si1'
_cell_volume   91.31
_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
  Na  Na1  1  0.1  0.09  0.32  1.0
  Na  Na2  1  0.24  0.0  0.37  1.0
  Li  Li0  1  0.2  0.0  0.17  1.0
  Si  Si3  1  0.81  0.09  0.31  1.0

data_Na2LiSi
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.85
_cell_length_b   4.18
_cell_length_c   7.68
_cell_angle_alpha   90.0
_cell_angle_beta   94.03
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2LiSi
_chemical_formula_sum   'Na2 Li1 Si1'
_cell_volume   91.31
_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
  Na  Na0  1  0.1  0.09  0.32  1.0
  Na  Na1  1  0.24  0.0  0.37  1.0
  Li  Li2  1  0.2  0.0  0.17  1.0
  Si  Si3  1  0.81  0.09  0.31  1.0

Na Na Li Si
Na Na Li Si 0 1 o o o 0 2 o o o 0 3 - o o 1 2 o o o 