data_PtSeCl2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.98
_cell_length_b   4.98
_cell_length_c   4.98
_cell_angle_alpha   127.35
_cell_angle_beta   127.35
_cell_angle_gamma   77.68
_symmetry_Int_Tables_number   1
_chemical_formula_structural   PtSeCl2
_chemical_formula_sum   'Pt1 Se1 Cl2'
_cell_volume   75.54
_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  0.0  0.0  0.88  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0
  Cl  Cl0  1  0.21  0.0  0.94  1.0
  Cl  Cl1  1  0.0  0.21  0.94  1.0

data_PtSeCl2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.24
_cell_length_b   6.24
_cell_length_c   4.98
_cell_angle_alpha   90.0
_cell_angle_beta   128.84
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   PtSeCl2
_chemical_formula_sum   'Pt2 Se2 Cl4'
_cell_volume   151.09
_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  0.0  0.0  0.88  1.0
  Se  Se1  2  0.0  0.0  0.0  1.0
  Cl  Cl2  4  0.4  0.4  0.73  1.0

Pt Se Cl Cl
PtSeCl2 is Ammonia-derived structured and crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two PtSeCl2 clusters. Pt(1) is bonded in a trigonal non-coplanar geometry to one Se(1) and two equivalent Cl(1) atoms. The Pt(1)-Se(1) bond length is 0.61 Å. Both Pt(1)-Cl(1) bond lengths are 0.88 Å. Se(1) is bonded in a single-bond geometry to one Pt(1) atom. Cl(1) is bonded in a single-bond geometry to one Pt(1) atom.