data_Na2NbSn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.62
_cell_length_b   6.62
_cell_length_c   2.99
_cell_angle_alpha   102.41
_cell_angle_beta   102.41
_cell_angle_gamma   126.87
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2NbSn
_chemical_formula_sum   'Na2 Nb1 Sn1'
_cell_volume   91.71
_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  0.76  0.04  0.31  1.0
  Na  Na1  1  0.76  0.96  0.31  1.0
  Nb  Nb2  1  0.0  0.0  0.0  1.0
  Sn  Sn3  1  0.96  0.0  0.0  1.0

data_Na2NbSn
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.99
_cell_length_b   5.19
_cell_length_c   6.62
_cell_angle_alpha   112.71
_cell_angle_beta   102.41
_cell_angle_gamma   91.57
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2NbSn
_chemical_formula_sum   'Na2 Nb1 Sn1'
_cell_volume   91.71
_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  0.27  0.96  0.72  1.0
  Na  Na1  1  0.35  0.04  0.8  1.0
  Nb  Nb2  1  0.0  0.0  0.0  1.0
  Sn  Sn3  1  0.0  0.0  0.96  1.0

Na Na Nb Sn