data_Na2NbPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.27
_cell_length_b   6.27
_cell_length_c   3.09
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   124.5
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2NbPb
_chemical_formula_sum   'Na2 Nb1 Pb1'
_cell_volume   100.26
_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  0.46  0.22  0.55  1.0
  Na  Na1  1  0.46  0.78  0.55  1.0
  Nb  Nb2  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  0.92  0.0  0.0  1.0

data_Na2NbPb
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.09
_cell_length_b   5.84
_cell_length_c   6.27
_cell_angle_alpha   117.75
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2NbPb
_chemical_formula_sum   'Na2 Nb1 Pb1'
_cell_volume   100.26
_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  0.55  0.22  0.68  1.0
  Na  Na1  1  0.55  0.78  0.24  1.0
  Nb  Nb2  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  0.0  0.0  0.92  1.0

Na Na Nb Pb