data_SiSnPt2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.07
_cell_length_b   3.07
_cell_length_c   7.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiSnPt2
_chemical_formula_sum   'Si1 Sn1 Pt2'
_cell_volume   69.39
_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  0.0  1.0
  Sn  Sn3  1  0.0  0.0  0.69  1.0
  Pt  Pt0  1  0.53  0.53  0.98  1.0
  Pt  Pt1  1  0.53  0.53  0.4  1.0

data_SiSnPt2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.33
_cell_length_b   4.33
_cell_length_c   7.39
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiSnPt2
_chemical_formula_sum   'Si2 Sn2 Pt4'
_cell_volume   138.78
_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
  Sn  Sn1  2  0.0  0.0  0.69  1.0
  Pt  Pt2  2  0.03  0.5  0.4  1.0
  Pt  Pt3  2  0.03  0.5  0.98  1.0

Si Sn Pt Pt
Pt2SnSi crystallizes in the monoclinic Cm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted square co-planar geometry to one Pt(2), four equivalent Sn(1), and four equivalent Si(1) atoms. The Pt(1)-Pt(2) bond length is 3.09 Å. There are a spread of Pt(1)-Sn(1) bond distances ranging from 2.95-3.15 Å. There are a spread of Pt(1)-Si(1) bond distances ranging from 2.03-2.31 Å. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Pt(1), four equivalent Pt(2), and four equivalent Sn(1) atoms. All Pt(2)-Pt(2) bond lengths are 3.07 Å. There are a spread of Pt(2)-Sn(1) bond distances ranging from 2.95-3.15 Å. Sn(1) is bonded in a 13-coordinate geometry to four equivalent Pt(1), four equivalent Pt(2), four equivalent Sn(1), and one Si(1) atom. All Sn(1)-Sn(1) bond lengths are 3.07 Å. The Sn(1)-Si(1) bond length is 2.27 Å. Si(1) is bonded to four equivalent Pt(1) and one Sn(1) atom to form a mixture of corner and edge-sharing SiSnPt4 square pyramids.