data_NaAs2Pb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.08
_cell_length_b   6.08
_cell_length_c   5.12
_cell_angle_alpha   108.75
_cell_angle_beta   108.75
_cell_angle_gamma   34.74
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaAs2Pb
_chemical_formula_sum   'Na1 As2 Pb1'
_cell_volume   101.63
_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  Na2  1  0.05  0.0  0.63  1.0
  As  As0  1  0.1  0.0  0.07  1.0
  As  As1  1  0.15  0.0  0.65  1.0
  Pb  Pb3  1  0.13  0.0  0.89  1.0

data_NaAs2Pb
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.63
_cell_length_b   5.12
_cell_length_c   6.08
_cell_angle_alpha   108.75
_cell_angle_beta   107.37
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaAs2Pb
_chemical_formula_sum   'Na1 As2 Pb1'
_cell_volume   101.63
_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  0.63  0.05  1.0
  As  As1  1  0.0  0.07  0.1  1.0
  As  As2  1  0.0  0.65  0.15  1.0
  Pb  Pb3  1  0.0  0.89  0.13  1.0

Na As As Pb
Na As As Pb 0 2 o o o 1 3 o o - 
NaPbAs2 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one NaPbAs2 cluster. Na(1) is bonded in a single-bond geometry to one Pb(1) and one As(2) atom. The Na(1)-Pb(1) bond length is 1.26 Å. The Na(1)-As(2) bond length is 0.58 Å. Pb(1) is bonded in a 3-coordinate geometry to one Na(1), one As(1), and one As(2) atom. The Pb(1)-As(1) bond length is 1.00 Å. The Pb(1)-As(2) bond length is 1.28 Å. There are two inequivalent As sites. In the first As site, As(1) is bonded in a single-bond geometry to one Pb(1) atom. In the second As site, As(2) is bonded in a single-bond geometry to one Na(1) and one Pb(1) atom.