data_PtSeCl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.99
_cell_length_b   4.99
_cell_length_c   3.03
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PtSeCl2
_chemical_formula_sum   'Pt1 Se1 Cl2'
_cell_volume   75.38
_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
  Pt  Pt2  1  0.49  0.49  0.0  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0
  Cl  Cl0  1  0.0  0.49  0.52  1.0
  Cl  Cl1  1  0.49  0.0  0.52  1.0

data_PtSeCl2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.05
_cell_length_b   7.05
_cell_length_c   3.03
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   PtSeCl2
_chemical_formula_sum   'Pt2 Se2 Cl4'
_cell_volume   150.76
_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
  Pt  Pt0  2  0.49  0.0  -0.0  1.0
  Se  Se1  2  0.0  0.0  0.0  1.0
  Cl  Cl2  4  0.25  0.25  0.52  1.0

Pt Se Cl Cl
PtSeCl2 crystallizes in the monoclinic Cm space group. Pt(1) is bonded in a distorted body-centered cubic geometry to eight equivalent Cl(1) atoms. There are a spread of Pt(1)-Cl(1) bond distances ranging from 2.86-2.97 Å. Se(1) is bonded in a 10-coordinate geometry to two equivalent Se(1) and eight equivalent Cl(1) atoms. Both Se(1)-Se(1) bond lengths are 3.03 Å. There are a spread of Se(1)-Cl(1) bond distances ranging from 2.86-2.97 Å. Cl(1) is bonded in a distorted body-centered cubic geometry to four equivalent Pt(1) and four equivalent Se(1) atoms.