The structure described by PtTb2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Pt(1) atoms to form a mixture of corner and edge-sharing TbPt4 tetrahedra. In the second Tb site, Tb(2) is bonded in a 3-coordinate geometry to three equivalent Pt(1) atoms. Pt(1) is bonded in a 7-coordinate geometry to three equivalent Tb(2) and four equivalent Tb(1) atoms. is represented by the CIF file [CIF]
data_Tb2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.782
_cell_length_b   7.146
_cell_length_c   8.812
_cell_angle_alpha   90.002
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   301.148
_cell_formula_units_Z   4
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
  Tb  Tb0  1  0.750  0.143  0.917  1.0
  Tb  Tb1  1  0.250  0.857  0.083  1.0
  Tb  Tb2  1  0.750  0.643  0.583  1.0
  Tb  Tb3  1  0.250  0.357  0.417  1.0
  Tb  Tb4  1  0.750  0.008  0.333  1.0
  Tb  Tb5  1  0.250  0.992  0.667  1.0
  Tb  Tb6  1  0.750  0.508  0.167  1.0
  Tb  Tb7  1  0.250  0.492  0.833  1.0
  Pt  Pt8  1  0.750  0.741  0.910  1.0
  Pt  Pt9  1  0.250  0.259  0.090  1.0
  Pt  Pt10  1  0.750  0.241  0.590  1.0
  Pt  Pt11  1  0.250  0.759  0.410  1.0
[/CIF]
.
The structure described by PtTb2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to four equivalent Pt(1) atoms to form a mixture of corner and edge-sharing TbPt4 tetrahedra. In the second Tb site, Tb(2) is bonded in a 3-coordinate geometry to three equivalent Pt(1) atoms. Pt(1) is bonded in a 7-coordinate geometry to three equivalent Tb(2) and four equivalent Tb(1) atoms. is represented by the CIF file [CIF]
data_Tb2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.782
_cell_length_b   7.146
_cell_length_c   8.812
_cell_angle_alpha   90.002
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   301.148
_cell_formula_units_Z   4
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
  Tb  Tb0  1  0.750  0.143  0.917  1.0
  Tb  Tb1  1  0.250  0.857  0.083  1.0
  Tb  Tb2  1  0.750  0.643  0.583  1.0
  Tb  Tb3  1  0.250  0.357  0.417  1.0
  Tb  Tb4  1  0.750  0.008  0.333  1.0
  Tb  Tb5  1  0.250  0.992  0.667  1.0
  Tb  Tb6  1  0.750  0.508  0.167  1.0
  Tb  Tb7  1  0.250  0.492  0.833  1.0
  Pt  Pt8  1  0.750  0.741  0.910  1.0
  Pt  Pt9  1  0.250  0.259  0.090  1.0
  Pt  Pt10  1  0.750  0.241  0.590  1.0
  Pt  Pt11  1  0.250  0.759  0.410  1.0
[/CIF]
.