The material described by Ta2Pt3Se8 crystallizes in the orthorhombic Pbam space group. Ta(1) is bonded in a 6-coordinate geometry to two equivalent Pt(1), one Se(1), one Se(2), two equivalent Se(3), and two equivalent Se(4) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 7-coordinate geometry to two equivalent Ta(1), one Se(3), two equivalent Se(1), and two equivalent Se(2) atoms. In the second Pt site, Pt(2) is bonded in a square co-planar geometry to two equivalent Se(3) and two equivalent Se(4) atoms. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted T-shaped geometry to one Ta(1) and two equivalent Pt(1) atoms. In the second Se site, Se(2) is bonded in a distorted T-shaped geometry to one Ta(1) and two equivalent Pt(1) atoms. In the third Se site, Se(3) is bonded in a rectangular see-saw-like geometry to two equivalent Ta(1), one Pt(1), and one Pt(2) atom. In the fourth Se site, Se(4) is bonded in a distorted T-shaped geometry to two equivalent Ta(1) and one Pt(2) atom. is represented by the CIF file [CIF]
data_Ta2Pt3Se8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.589
_cell_length_b   11.105
_cell_length_c   15.328
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   610.901
_cell_formula_units_Z   2
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
  Ta  Ta0  1  0.500  0.697  0.373  1.0
  Ta  Ta1  1  0.500  0.303  0.627  1.0
  Ta  Ta2  1  0.500  0.197  0.127  1.0
  Ta  Ta3  1  0.500  0.803  0.873  1.0
  Pt  Pt4  1  0.000  0.852  0.276  1.0
  Pt  Pt5  1  0.000  0.148  0.724  1.0
  Pt  Pt6  1  0.000  0.352  0.224  1.0
  Pt  Pt7  1  0.000  0.648  0.776  1.0
  Pt  Pt8  1  0.000  0.500  0.500  1.0
  Pt  Pt9  1  0.000  0.000  0.000  1.0
  Se  Se10  1  0.500  0.929  0.372  1.0
  Se  Se11  1  0.500  0.071  0.628  1.0
  Se  Se12  1  0.500  0.429  0.128  1.0
  Se  Se13  1  0.500  0.571  0.872  1.0
  Se  Se14  1  0.500  0.730  0.207  1.0
  Se  Se15  1  0.500  0.270  0.793  1.0
  Se  Se16  1  0.500  0.230  0.293  1.0
  Se  Se17  1  0.500  0.770  0.707  1.0
  Se  Se18  1  0.000  0.528  0.342  1.0
  Se  Se19  1  0.000  0.472  0.658  1.0
  Se  Se20  1  0.000  0.779  0.998  1.0
  Se  Se21  1  0.000  0.221  0.002  1.0
  Se  Se22  1  0.000  0.279  0.502  1.0
  Se  Se23  1  0.000  0.721  0.498  1.0
  Se  Se24  1  0.000  0.972  0.842  1.0
  Se  Se25  1  0.000  0.028  0.158  1.0
[/CIF]
.
The material described by Ta2Pt3Se8 crystallizes in the orthorhombic Pbam space group. Ta(1) is bonded in a 6-coordinate geometry to two equivalent Pt(1), one Se(1), one Se(2), two equivalent Se(3), and two equivalent Se(4) atoms. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 7-coordinate geometry to two equivalent Ta(1), one Se(3), two equivalent Se(1), and two equivalent Se(2) atoms. In the second Pt site, Pt(2) is bonded in a square co-planar geometry to two equivalent Se(3) and two equivalent Se(4) atoms. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a distorted T-shaped geometry to one Ta(1) and two equivalent Pt(1) atoms. In the second Se site, Se(2) is bonded in a distorted T-shaped geometry to one Ta(1) and two equivalent Pt(1) atoms. In the third Se site, Se(3) is bonded in a rectangular see-saw-like geometry to two equivalent Ta(1), one Pt(1), and one Pt(2) atom. In the fourth Se site, Se(4) is bonded in a distorted T-shaped geometry to two equivalent Ta(1) and one Pt(2) atom. is represented by the CIF file [CIF]
data_Ta2Pt3Se8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.589
_cell_length_b   11.105
_cell_length_c   15.328
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   610.901
_cell_formula_units_Z   2
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
  Ta  Ta0  1  0.500  0.697  0.373  1.0
  Ta  Ta1  1  0.500  0.303  0.627  1.0
  Ta  Ta2  1  0.500  0.197  0.127  1.0
  Ta  Ta3  1  0.500  0.803  0.873  1.0
  Pt  Pt4  1  0.000  0.852  0.276  1.0
  Pt  Pt5  1  0.000  0.148  0.724  1.0
  Pt  Pt6  1  0.000  0.352  0.224  1.0
  Pt  Pt7  1  0.000  0.648  0.776  1.0
  Pt  Pt8  1  0.000  0.500  0.500  1.0
  Pt  Pt9  1  0.000  0.000  0.000  1.0
  Se  Se10  1  0.500  0.929  0.372  1.0
  Se  Se11  1  0.500  0.071  0.628  1.0
  Se  Se12  1  0.500  0.429  0.128  1.0
  Se  Se13  1  0.500  0.571  0.872  1.0
  Se  Se14  1  0.500  0.730  0.207  1.0
  Se  Se15  1  0.500  0.270  0.793  1.0
  Se  Se16  1  0.500  0.230  0.293  1.0
  Se  Se17  1  0.500  0.770  0.707  1.0
  Se  Se18  1  0.000  0.528  0.342  1.0
  Se  Se19  1  0.000  0.472  0.658  1.0
  Se  Se20  1  0.000  0.779  0.998  1.0
  Se  Se21  1  0.000  0.221  0.002  1.0
  Se  Se22  1  0.000  0.279  0.502  1.0
  Se  Se23  1  0.000  0.721  0.498  1.0
  Se  Se24  1  0.000  0.972  0.842  1.0
  Se  Se25  1  0.000  0.028  0.158  1.0
[/CIF]
.