data_SiAsPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.45
_cell_length_b   3.45
_cell_length_c   4.96
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAsPt
_chemical_formula_sum   'Si1 As1 Pt1'
_cell_volume   51.1
_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
  Si  Si2  1  0.0  0.0  0.17  1.0
  As  As0  1  1.0  0.99  0.02  1.0
  Pt  Pt1  1  0.72  1.0  0.77  1.0

data_SiAsPt
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.45
_cell_length_b   5.97
_cell_length_c   4.96
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiAsPt
_chemical_formula_sum   'Si2 As2 Pt2'
_cell_volume   102.19
_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
  Si  Si0  2  0.0  0.0  0.17  1.0
  As  As1  2  0.0  0.0  0.02  1.0
  Pt  Pt2  2  0.23  0.5  0.77  1.0

Si As Pt
PtSiAs is Indium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one PtSiAs cluster. Pt(1) is bonded in a distorted single-bond geometry to one As(1) atom. The Pt(1)-As(1) bond length is 1.57 Å. Si(1) is bonded in a single-bond geometry to one As(1) atom. The Si(1)-As(1) bond length is 0.72 Å. As(1) is bonded in a distorted single-bond geometry to one Pt(1) and one Si(1) atom.