The compound described by PtCl3 crystallizes in the trigonal R-3 space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Cl(1), one Cl(2), two equivalent Cl(5), and two equivalent Cl(6) atoms to form PtCl6 octahedra that share  a cornercorner with one Pt(2)Cl5 square pyramid and edges with two equivalent Pt(1)Cl6 octahedra. In the second Pt site, Pt(2) is bonded to one Cl(1), two equivalent Cl(3), and two equivalent Cl(4) atoms to form PtCl5 square pyramids that share  a cornercorner with one Pt(1)Cl6 octahedra and corners with four equivalent Pt(2)Cl5 square pyramids. The corner-sharing octahedral tilt angles are 4°. There are six inequivalent Cl sites. In the first Cl site, Cl(6) is bonded in an L-shaped geometry to two equivalent Pt(1) atoms. In the second Cl site, Cl(1) is bonded in a linear geometry to one Pt(1) and one Pt(2) atom. In the third Cl site, Cl(2) is bonded in a single-bond geometry to one Pt(1) atom. In the fourth Cl site, Cl(3) is bonded in an L-shaped geometry to two equivalent Pt(2) atoms. In the fifth Cl site, Cl(4) is bonded in an L-shaped geometry to two equivalent Pt(2) atoms. In the sixth Cl site, Cl(5) is bonded in an L-shaped geometry to two equivalent Pt(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_PtCl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.756
_cell_length_b   12.756
_cell_length_c   12.756
_cell_angle_alpha   115.008
_cell_angle_beta   115.008
_cell_angle_gamma   115.008
_symmetry_Int_Tables_number   1
_cell_volume   1160.672
_cell_formula_units_Z   12
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  Pt0  1  0.231  0.803  0.477  1.0
  Pt  Pt1  1  0.803  0.477  0.231  1.0
  Pt  Pt2  1  0.477  0.231  0.803  1.0
  Pt  Pt3  1  0.769  0.197  0.523  1.0
  Pt  Pt4  1  0.197  0.523  0.769  1.0
  Pt  Pt5  1  0.523  0.769  0.197  1.0
  Pt  Pt6  1  0.754  0.934  0.834  1.0
  Pt  Pt7  1  0.934  0.834  0.754  1.0
  Pt  Pt8  1  0.834  0.754  0.934  1.0
  Pt  Pt9  1  0.246  0.066  0.166  1.0
  Pt  Pt10  1  0.066  0.166  0.246  1.0
  Pt  Pt11  1  0.166  0.246  0.066  1.0
  Cl  Cl12  1  0.465  0.855  0.631  1.0
  Cl  Cl13  1  0.855  0.631  0.465  1.0
  Cl  Cl14  1  0.631  0.465  0.855  1.0
  Cl  Cl15  1  0.535  0.145  0.369  1.0
  Cl  Cl16  1  0.145  0.369  0.535  1.0
  Cl  Cl17  1  0.369  0.535  0.145  1.0
  Cl  Cl18  1  0.169  0.651  0.240  1.0
  Cl  Cl19  1  0.651  0.240  0.169  1.0
  Cl  Cl20  1  0.240  0.169  0.651  1.0
  Cl  Cl21  1  0.831  0.349  0.760  1.0
  Cl  Cl22  1  0.349  0.760  0.831  1.0
  Cl  Cl23  1  0.760  0.831  0.349  1.0
  Cl  Cl24  1  0.097  0.078  0.824  1.0
  Cl  Cl25  1  0.824  0.097  0.078  1.0
  Cl  Cl26  1  0.078  0.824  0.097  1.0
  Cl  Cl27  1  0.903  0.922  0.176  1.0
  Cl  Cl28  1  0.176  0.903  0.922  1.0
  Cl  Cl29  1  0.922  0.176  0.903  1.0
  Cl  Cl30  1  0.400  0.302  0.224  1.0
  Cl  Cl31  1  0.224  0.400  0.302  1.0
  Cl  Cl32  1  0.302  0.224  0.400  1.0
  Cl  Cl33  1  0.600  0.698  0.776  1.0
  Cl  Cl34  1  0.776  0.600  0.698  1.0
  Cl  Cl35  1  0.698  0.776  0.600  1.0
  Cl  Cl36  1  0.444  0.600  0.948  1.0
  Cl  Cl37  1  0.948  0.444  0.600  1.0
  Cl  Cl38  1  0.600  0.948  0.444  1.0
  Cl  Cl39  1  0.556  0.400  0.052  1.0
  Cl  Cl40  1  0.052  0.556  0.400  1.0
  Cl  Cl41  1  0.400  0.052  0.556  1.0
  Cl  Cl42  1  0.692  0.026  0.270  1.0
  Cl  Cl43  1  0.270  0.692  0.026  1.0
  Cl  Cl44  1  0.026  0.270  0.692  1.0
  Cl  Cl45  1  0.308  0.974  0.730  1.0
  Cl  Cl46  1  0.730  0.308  0.974  1.0
  Cl  Cl47  1  0.974  0.730  0.308  1.0
[/CIF]
.
The compound described by PtCl3 crystallizes in the trigonal R-3 space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Cl(1), one Cl(2), two equivalent Cl(5), and two equivalent Cl(6) atoms to form PtCl6 octahedra that share  a cornercorner with one Pt(2)Cl5 square pyramid and edges with two equivalent Pt(1)Cl6 octahedra. In the second Pt site, Pt(2) is bonded to one Cl(1), two equivalent Cl(3), and two equivalent Cl(4) atoms to form PtCl5 square pyramids that share  a cornercorner with one Pt(1)Cl6 octahedra and corners with four equivalent Pt(2)Cl5 square pyramids. The corner-sharing octahedral tilt angles are 4°. There are six inequivalent Cl sites. In the first Cl site, Cl(6) is bonded in an L-shaped geometry to two equivalent Pt(1) atoms. In the second Cl site, Cl(1) is bonded in a linear geometry to one Pt(1) and one Pt(2) atom. In the third Cl site, Cl(2) is bonded in a single-bond geometry to one Pt(1) atom. In the fourth Cl site, Cl(3) is bonded in an L-shaped geometry to two equivalent Pt(2) atoms. In the fifth Cl site, Cl(4) is bonded in an L-shaped geometry to two equivalent Pt(2) atoms. In the sixth Cl site, Cl(5) is bonded in an L-shaped geometry to two equivalent Pt(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_PtCl3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   12.756
_cell_length_b   12.756
_cell_length_c   12.756
_cell_angle_alpha   115.008
_cell_angle_beta   115.008
_cell_angle_gamma   115.008
_symmetry_Int_Tables_number   1
_cell_volume   1160.672
_cell_formula_units_Z   12
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  Pt0  1  0.231  0.803  0.477  1.0
  Pt  Pt1  1  0.803  0.477  0.231  1.0
  Pt  Pt2  1  0.477  0.231  0.803  1.0
  Pt  Pt3  1  0.769  0.197  0.523  1.0
  Pt  Pt4  1  0.197  0.523  0.769  1.0
  Pt  Pt5  1  0.523  0.769  0.197  1.0
  Pt  Pt6  1  0.754  0.934  0.834  1.0
  Pt  Pt7  1  0.934  0.834  0.754  1.0
  Pt  Pt8  1  0.834  0.754  0.934  1.0
  Pt  Pt9  1  0.246  0.066  0.166  1.0
  Pt  Pt10  1  0.066  0.166  0.246  1.0
  Pt  Pt11  1  0.166  0.246  0.066  1.0
  Cl  Cl12  1  0.465  0.855  0.631  1.0
  Cl  Cl13  1  0.855  0.631  0.465  1.0
  Cl  Cl14  1  0.631  0.465  0.855  1.0
  Cl  Cl15  1  0.535  0.145  0.369  1.0
  Cl  Cl16  1  0.145  0.369  0.535  1.0
  Cl  Cl17  1  0.369  0.535  0.145  1.0
  Cl  Cl18  1  0.169  0.651  0.240  1.0
  Cl  Cl19  1  0.651  0.240  0.169  1.0
  Cl  Cl20  1  0.240  0.169  0.651  1.0
  Cl  Cl21  1  0.831  0.349  0.760  1.0
  Cl  Cl22  1  0.349  0.760  0.831  1.0
  Cl  Cl23  1  0.760  0.831  0.349  1.0
  Cl  Cl24  1  0.097  0.078  0.824  1.0
  Cl  Cl25  1  0.824  0.097  0.078  1.0
  Cl  Cl26  1  0.078  0.824  0.097  1.0
  Cl  Cl27  1  0.903  0.922  0.176  1.0
  Cl  Cl28  1  0.176  0.903  0.922  1.0
  Cl  Cl29  1  0.922  0.176  0.903  1.0
  Cl  Cl30  1  0.400  0.302  0.224  1.0
  Cl  Cl31  1  0.224  0.400  0.302  1.0
  Cl  Cl32  1  0.302  0.224  0.400  1.0
  Cl  Cl33  1  0.600  0.698  0.776  1.0
  Cl  Cl34  1  0.776  0.600  0.698  1.0
  Cl  Cl35  1  0.698  0.776  0.600  1.0
  Cl  Cl36  1  0.444  0.600  0.948  1.0
  Cl  Cl37  1  0.948  0.444  0.600  1.0
  Cl  Cl38  1  0.600  0.948  0.444  1.0
  Cl  Cl39  1  0.556  0.400  0.052  1.0
  Cl  Cl40  1  0.052  0.556  0.400  1.0
  Cl  Cl41  1  0.400  0.052  0.556  1.0
  Cl  Cl42  1  0.692  0.026  0.270  1.0
  Cl  Cl43  1  0.270  0.692  0.026  1.0
  Cl  Cl44  1  0.026  0.270  0.692  1.0
  Cl  Cl45  1  0.308  0.974  0.730  1.0
  Cl  Cl46  1  0.730  0.308  0.974  1.0
  Cl  Cl47  1  0.974  0.730  0.308  1.0
[/CIF]
.