The structure described by Pt3Pd is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent Pt(1), four equivalent Pt(2), and four equivalent Pd(1) atoms to form PtPd4Pt8 cuboctahedra that share corners with twelve equivalent Pt(1)Pd4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Pd4Pt8 cuboctahedra, edges with eight equivalent Pt(2)Pd4Pt8 cuboctahedra, edges with eight equivalent Pd(1)Pt12 cuboctahedra, faces with four equivalent Pt(2)Pd4Pt8 cuboctahedra, faces with four equivalent Pd(1)Pt12 cuboctahedra, and faces with ten equivalent Pt(1)Pd4Pt8 cuboctahedra. In the second Pt site, Pt(2) is bonded to eight equivalent Pt(1) and four equivalent Pd(1) atoms to form PtPd4Pt8 cuboctahedra that share corners with four equivalent Pt(2)Pd4Pt8 cuboctahedra, corners with eight equivalent Pd(1)Pt12 cuboctahedra, edges with eight equivalent Pt(2)Pd4Pt8 cuboctahedra, edges with sixteen equivalent Pt(1)Pd4Pt8 cuboctahedra, faces with four equivalent Pt(2)Pd4Pt8 cuboctahedra, faces with six equivalent Pd(1)Pt12 cuboctahedra, and faces with eight equivalent Pt(1)Pd4Pt8 cuboctahedra. Pd(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form PdPt12 cuboctahedra that share corners with four equivalent Pd(1)Pt12 cuboctahedra, corners with eight equivalent Pt(2)Pd4Pt8 cuboctahedra, edges with eight equivalent Pd(1)Pt12 cuboctahedra, edges with sixteen equivalent Pt(1)Pd4Pt8 cuboctahedra, faces with four equivalent Pd(1)Pt12 cuboctahedra, faces with six equivalent Pt(2)Pd4Pt8 cuboctahedra, and faces with eight equivalent Pt(1)Pd4Pt8 cuboctahedra. is represented by the CIF file [CIF]
data_PdPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.807
_cell_length_b   4.807
_cell_length_c   4.807
_cell_angle_alpha   131.566
_cell_angle_beta   131.566
_cell_angle_gamma   70.916
_symmetry_Int_Tables_number   1
_cell_volume   60.906
_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
  Pd  Pd0  1  0.000  0.000  0.000  1.0
  Pt  Pt1  1  0.750  0.250  0.500  1.0
  Pt  Pt2  1  0.250  0.750  0.500  1.0
  Pt  Pt3  1  0.500  0.500  0.000  1.0
[/CIF]
.
The structure described by Pt3Pd is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to four equivalent Pt(1), four equivalent Pt(2), and four equivalent Pd(1) atoms to form PtPd4Pt8 cuboctahedra that share corners with twelve equivalent Pt(1)Pd4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Pd4Pt8 cuboctahedra, edges with eight equivalent Pt(2)Pd4Pt8 cuboctahedra, edges with eight equivalent Pd(1)Pt12 cuboctahedra, faces with four equivalent Pt(2)Pd4Pt8 cuboctahedra, faces with four equivalent Pd(1)Pt12 cuboctahedra, and faces with ten equivalent Pt(1)Pd4Pt8 cuboctahedra. In the second Pt site, Pt(2) is bonded to eight equivalent Pt(1) and four equivalent Pd(1) atoms to form PtPd4Pt8 cuboctahedra that share corners with four equivalent Pt(2)Pd4Pt8 cuboctahedra, corners with eight equivalent Pd(1)Pt12 cuboctahedra, edges with eight equivalent Pt(2)Pd4Pt8 cuboctahedra, edges with sixteen equivalent Pt(1)Pd4Pt8 cuboctahedra, faces with four equivalent Pt(2)Pd4Pt8 cuboctahedra, faces with six equivalent Pd(1)Pt12 cuboctahedra, and faces with eight equivalent Pt(1)Pd4Pt8 cuboctahedra. Pd(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form PdPt12 cuboctahedra that share corners with four equivalent Pd(1)Pt12 cuboctahedra, corners with eight equivalent Pt(2)Pd4Pt8 cuboctahedra, edges with eight equivalent Pd(1)Pt12 cuboctahedra, edges with sixteen equivalent Pt(1)Pd4Pt8 cuboctahedra, faces with four equivalent Pd(1)Pt12 cuboctahedra, faces with six equivalent Pt(2)Pd4Pt8 cuboctahedra, and faces with eight equivalent Pt(1)Pd4Pt8 cuboctahedra. is represented by the CIF file [CIF]
data_PdPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.807
_cell_length_b   4.807
_cell_length_c   4.807
_cell_angle_alpha   131.566
_cell_angle_beta   131.566
_cell_angle_gamma   70.916
_symmetry_Int_Tables_number   1
_cell_volume   60.906
_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
  Pd  Pd0  1  0.000  0.000  0.000  1.0
  Pt  Pt1  1  0.750  0.250  0.500  1.0
  Pt  Pt2  1  0.250  0.750  0.500  1.0
  Pt  Pt3  1  0.500  0.500  0.000  1.0
[/CIF]
.