data_SiAsPt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.15
_cell_length_b   8.15
_cell_length_c   8.15
_cell_angle_alpha   21.49
_cell_angle_beta   21.49
_cell_angle_gamma   21.49
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiAsPt2
_chemical_formula_sum   'Si1 As1 Pt2'
_cell_volume   63.66
_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  Si3  1  0.0  0.0  0.0  1.0
  As  As0  1  0.0  0.0  0.94  1.0
  Pt  Pt1  1  0.0  0.0  0.67  1.0
  Pt  Pt2  1  0.0  0.0  0.21  1.0

data_SiAsPt2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.26
_cell_length_b   3.04
_cell_length_c   8.15
_cell_angle_alpha   90.0
_cell_angle_beta   102.43
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiAsPt2
_chemical_formula_sum   'Si2 As2 Pt4'
_cell_volume   127.33
_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  0.0  1.0
  As  As1  2  0.0  0.0  0.06  1.0
  Pt  Pt2  2  0.0  0.0  0.79  1.0
  Pt  Pt3  2  0.0  0.0  0.33  1.0

Si As Pt Pt
Pt2SiAs crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Pt2SiAs clusters. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a single-bond geometry to one As(1) atom. The Pt(1)-As(1) bond length is 2.22 Å. In the second Pt site, Pt(2) is bonded in a single-bond geometry to one Si(1) atom. The Pt(2)-Si(1) bond length is 1.74 Å. Si(1) is bonded in a distorted single-bond geometry to one Pt(2) and one As(1) atom. The Si(1)-As(1) bond length is 0.48 Å. As(1) is bonded in a single-bond geometry to one Pt(1) and one Si(1) atom.