data_NaTePb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.26
_cell_length_b   6.26
_cell_length_c   6.26
_cell_angle_alpha   139.88
_cell_angle_beta   129.0
_cell_angle_gamma   66.79
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaTePb2
_chemical_formula_sum   'Na1 Te1 Pb2'
_cell_volume   120.79
_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  0.0  0.0  0.75  1.0
  Te  Te3  1  0.0  0.69  0.06  1.0
  Pb  Pb1  1  0.0  0.69  0.15  1.0
  Pb  Pb2  1  0.0  0.0  0.71  1.0

data_NaTePb2
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.29
_cell_length_b   5.39
_cell_length_c   6.26
_cell_angle_alpha   115.5
_cell_angle_beta   110.06
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaTePb2
_chemical_formula_sum   'Na1 Te1 Pb2'
_cell_volume   120.79
_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  0.25  0.25  0.25  1.0
  Te  Te1  1  0.94  0.63  0.63  1.0
  Pb  Pb2  1  0.29  0.29  0.29  1.0
  Pb  Pb3  1  0.85  0.54  0.54  1.0

Na Te Pb Pb
Na Te Pb Pb 0 3 o o o 1 2 o o o 
NaPbPbTe is alpha Selenium-derived structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one lead telluride molecule and one lead;sodium molecule.