data_Ta2NbPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.37
_cell_length_b   5.37
_cell_length_c   5.37
_cell_angle_alpha   131.74
_cell_angle_beta   131.74
_cell_angle_gamma   70.65
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2NbPb
_chemical_formula_sum   'Ta2 Nb1 Pb1'
_cell_volume   84.53
_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
  Ta  Ta2  1  0.0  0.0  0.38  1.0
  Ta  Ta3  1  0.2  0.0  0.19  1.0
  Nb  Nb0  1  0.0  0.0  0.0  1.0
  Pb  Pb1  1  0.0  0.2  0.19  1.0

data_Ta2NbPb
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.39
_cell_length_b   4.39
_cell_length_c   5.37
_cell_angle_alpha   114.13
_cell_angle_beta   114.13
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Ta2NbPb
_chemical_formula_sum   'Ta2 Nb1 Pb1'
_cell_volume   84.53
_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
  Ta  Ta0  1  0.19  1.0  1.0  1.0
  Ta  Ta1  1  0.38  0.38  0.38  1.0
  Nb  Nb2  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  1.0  0.19  1.0  1.0

Ta Ta Nb Pb