data_SiPt2Br
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.61
_cell_length_b   4.61
_cell_length_c   4.61
_cell_angle_alpha   121.63
_cell_angle_beta   121.63
_cell_angle_gamma   87.21
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SiPt2Br
_chemical_formula_sum   'Si1 Pt2 Br1'
_cell_volume   67.5
_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
  Pt  Pt1  1  0.0  0.25  0.67  1.0
  Pt  Pt2  1  0.25  0.0  0.67  1.0
  Br  Br0  1  0.0  0.0  0.34  1.0

data_SiPt2Br
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.36
_cell_length_b   6.36
_cell_length_c   4.61
_cell_angle_alpha   90.0
_cell_angle_beta   133.6
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SiPt2Br
_chemical_formula_sum   'Si2 Pt4 Br2'
_cell_volume   134.99
_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
  Pt  Pt1  4  0.45  0.12  0.58  1.0
  Br  Br2  2  0.16  0.5  0.66  1.0

Si Pt Pt Br
Si Pt Pt Br 0 3 o o o 1 3 o o o 1 2 o o o 2 3 o o o 
Pt2SiBr is Copper structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two Pt2SiBr clusters. Pt(1) is bonded in a distorted single-bond geometry to one Br(1) atom. The Pt(1)-Br(1) bond length is 1.34 Å. Si(1) is bonded in a distorted single-bond geometry to one Br(1) atom. The Si(1)-Br(1) bond length is 1.56 Å. Br(1) is bonded in a 3-coordinate geometry to two equivalent Pt(1) and one Si(1) atom.