data_SnAsPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.32
_cell_length_b   6.32
_cell_length_c   6.32
_cell_angle_alpha   145.75
_cell_angle_beta   145.75
_cell_angle_gamma   49.22
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SnAsPb
_chemical_formula_sum   'Sn1 As1 Pb1'
_cell_volume   79.63
_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
  Sn  Sn2  1  0.0  0.0  0.17  1.0
  As  As0  1  0.0  0.0  0.32  1.0
  Pb  Pb1  1  0.0  0.0  0.49  1.0

data_SnAsPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.26
_cell_length_b   5.26
_cell_length_c   6.32
_cell_angle_alpha   90.0
_cell_angle_beta   114.61
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SnAsPb
_chemical_formula_sum   'Sn2 As2 Pb2'
_cell_volume   159.25
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Sn  Sn0  2  0.0  0.0  0.83  1.0
  As  As1  2  0.0  0.0  0.68  1.0
  Pb  Pb2  2  0.0  0.0  0.51  1.0

Sn As Pb
Sn As Pb 0 1 o o o 1 2 o o o 
PbSnAs is Cyanogen Chloride-like structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two PbSnAs clusters. Pb(1) is bonded in a single-bond geometry to one As(1) atom. The Pb(1)-As(1) bond length is 1.11 Å. Sn(1) is bonded in a single-bond geometry to one As(1) atom. The Sn(1)-As(1) bond length is 0.92 Å. As(1) is bonded in a linear geometry to one Pb(1) and one Sn(1) atom.