The structure described by Pt3Ti is Uranium Silicide-like structured and crystallizes in the trigonal P-3m1 space group. There are four inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to three Pt(1,1); three equivalent Pt(2); and six equivalent Pt(3) atoms to form TiPt12 cuboctahedra that share corners with three equivalent Ti(3)Pt12 cuboctahedra; corners with six equivalent Ti(1)Pt12 cuboctahedra; corners with six equivalent Pt(4)Ti4Pt8 cuboctahedra; edges with six equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with nine Pt(1,1)Ti4Pt8 cuboctahedra;  a faceface with one Ti(4)Pt12 cuboctahedra; faces with three equivalent Ti(2)Pt12 cuboctahedra; faces with three equivalent Ti(3)Pt12 cuboctahedra; faces with three Pt(1,1)Ti4Pt8 cuboctahedra; and faces with six equivalent Pt(3)Ti4Pt8 cuboctahedra. In the second Ti site, Ti(2) is bonded to three equivalent Pt(3), three equivalent Pt(4), and six equivalent Pt(2) atoms to form TiPt12 cuboctahedra that share corners with three equivalent Ti(3)Pt12 cuboctahedra; corners with nine equivalent Ti(2)Pt12 cuboctahedra; edges with three Pt(1,1)Ti4Pt8 cuboctahedra; edges with six equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with six equivalent Pt(4)Ti4Pt8 cuboctahedra; faces with three equivalent Ti(1)Pt12 cuboctahedra; faces with three equivalent Ti(4)Pt12 cuboctahedra; faces with three equivalent Pt(3)Ti4Pt8 cuboctahedra; and faces with three equivalent Pt(4)Ti4Pt8 cuboctahedra. In the third Ti site, Ti(3) is bonded to three equivalent Pt(3) and nine Pt(1,1) atoms to form TiPt12 cuboctahedra that share corners with three equivalent Ti(1)Pt12 cuboctahedra; corners with three equivalent Ti(2)Pt12 cuboctahedra; corners with six equivalent Ti(3)Pt12 cuboctahedra; edges with nine equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with twelve Pt(1,1)Ti4Pt8 cuboctahedra; faces with three equivalent Ti(1)Pt12 cuboctahedra; faces with three equivalent Ti(3)Pt12 cuboctahedra; faces with three equivalent Pt(3)Ti4Pt8 cuboctahedra; and faces with nine Pt(1,1)Ti4Pt8 cuboctahedra. In the fourth Ti site, Ti(4) is bonded to six equivalent Pt(2) and six equivalent Pt(4) atoms to form TiPt12 cuboctahedra that share corners with six equivalent Ti(4)Pt12 cuboctahedra, corners with twelve equivalent Pt(3)Ti4Pt8 cuboctahedra, edges with six equivalent Pt(4)Ti4Pt8 cuboctahedra, faces with two equivalent Ti(1)Pt12 cuboctahedra, faces with six equivalent Ti(2)Pt12 cuboctahedra, and faces with six equivalent Pt(4)Ti4Pt8 cuboctahedra. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Ti(1); three equivalent Ti(3); two equivalent Pt(3); and six Pt(1,1) atoms to form distorted PtTi4Pt8 cuboctahedra that share corners with three equivalent Pt(3)Ti4Pt8 cuboctahedra; corners with six equivalent Pt(1)Ti4Pt8 cuboctahedra;  an edgeedge with one Ti(2)Pt12 cuboctahedra; edges with three equivalent Ti(1)Pt12 cuboctahedra; edges with four equivalent Ti(3)Pt12 cuboctahedra; edges with six equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with eight Pt(1,1)Ti4Pt8 cuboctahedra;  a faceface with one Ti(1)Pt12 cuboctahedra; faces with three equivalent Ti(3)Pt12 cuboctahedra; faces with five equivalent Pt(3)Ti4Pt8 cuboctahedra; and faces with nine Pt(1,1)Ti4Pt8 cuboctahedra. In the second Pt site, Pt(2) is bonded in a distorted see-saw-like geometry to one Ti(1), one Ti(4), two equivalent Ti(2), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the third Pt site, Pt(3) is bonded to one Ti(2); one Ti(3); two equivalent Ti(1); two Pt(1,1); two equivalent Pt(2); and four equivalent Pt(3) atoms to form distorted PtTi4Pt8 cuboctahedra that share corners with two equivalent Ti(4)Pt12 cuboctahedra; corners with three equivalent Pt(1)Ti4Pt8 cuboctahedra; corners with four equivalent Pt(4)Ti4Pt8 cuboctahedra; corners with six equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with two equivalent Ti(1)Pt12 cuboctahedra; edges with two equivalent Ti(2)Pt12 cuboctahedra; edges with three equivalent Ti(3)Pt12 cuboctahedra; edges with four equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with six Pt(1,1)Ti4Pt8 cuboctahedra;  a faceface with one Ti(2)Pt12 cuboctahedra;  a faceface with one Ti(3)Pt12 cuboctahedra;  a faceface with one Pt(4)Ti4Pt8 cuboctahedra; faces with two equivalent Ti(1)Pt12 cuboctahedra; faces with four equivalent Pt(3)Ti4Pt8 cuboctahedra; and faces with five Pt(1,1)Ti4Pt8 cuboctahedra. In the fourth Pt site, Pt(1) is bonded to one Ti(1), three equivalent Ti(3), two equivalent Pt(3), and six equivalent Pt(1) atoms to form distorted PtTi4Pt8 cuboctahedra that share corners with three equivalent Pt(3)Ti4Pt8 cuboctahedra, corners with six equivalent Pt(1)Ti4Pt8 cuboctahedra,  an edgeedge with one Ti(2)Pt12 cuboctahedra, edges with three equivalent Ti(1)Pt12 cuboctahedra, edges with four equivalent Ti(3)Pt12 cuboctahedra, edges with six equivalent Pt(3)Ti4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Ti4Pt8 cuboctahedra,  a faceface with one Ti(1)Pt12 cuboctahedra, faces with three equivalent Ti(3)Pt12 cuboctahedra, faces with five equivalent Pt(3)Ti4Pt8 cuboctahedra, and faces with nine equivalent Pt(1)Ti4Pt8 cuboctahedra. In the fifth Pt site, Pt(4) is bonded to two equivalent Ti(2), two equivalent Ti(4), four equivalent Pt(2), and four equivalent Pt(4) atoms to form distorted PtTi4Pt8 cuboctahedra that share corners with four equivalent Ti(1)Pt12 cuboctahedra, corners with six equivalent Pt(4)Ti4Pt8 cuboctahedra, corners with eight equivalent Pt(3)Ti4Pt8 cuboctahedra, edges with two equivalent Ti(4)Pt12 cuboctahedra, edges with four equivalent Ti(2)Pt12 cuboctahedra, edges with four equivalent Pt(4)Ti4Pt8 cuboctahedra, faces with two equivalent Ti(2)Pt12 cuboctahedra, faces with two equivalent Ti(4)Pt12 cuboctahedra, faces with two equivalent Pt(3)Ti4Pt8 cuboctahedra, and faces with four equivalent Pt(4)Ti4Pt8 cuboctahedra. is represented by the CIF card [CIF]
data_TiPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.551
_cell_length_b   5.551
_cell_length_c   15.857
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   423.162
_cell_formula_units_Z   7
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
  Ti  Ti0  1  0.000  0.000  0.720  1.0
  Ti  Ti1  1  0.667  0.333  0.856  1.0
  Ti  Ti2  1  0.333  0.667  0.144  1.0
  Ti  Ti3  1  0.000  0.000  0.280  1.0
  Ti  Ti4  1  0.667  0.333  0.430  1.0
  Ti  Ti5  1  0.000  0.000  0.000  1.0
  Ti  Ti6  1  0.333  0.667  0.570  1.0
  Pt  Pt7  1  0.833  0.666  0.571  1.0
  Pt  Pt8  1  0.334  0.167  0.571  1.0
  Pt  Pt9  1  0.167  0.333  0.857  1.0
  Pt  Pt10  1  0.167  0.334  0.429  1.0
  Pt  Pt11  1  0.167  0.833  0.429  1.0
  Pt  Pt12  1  0.500  0.001  0.713  1.0
  Pt  Pt13  1  0.666  0.833  0.429  1.0
  Pt  Pt14  1  0.167  0.833  0.857  1.0
  Pt  Pt15  1  0.667  0.833  0.857  1.0
  Pt  Pt16  1  0.833  0.167  0.143  1.0
  Pt  Pt17  1  0.833  0.167  0.571  1.0
  Pt  Pt18  1  0.500  0.500  0.713  1.0
  Pt  Pt19  1  0.333  0.167  0.143  1.0
  Pt  Pt20  1  0.833  0.667  0.143  1.0
  Pt  Pt21  1  0.500  0.500  0.287  1.0
  Pt  Pt22  1  0.500  0.999  0.287  1.0
  Pt  Pt23  1  0.500  0.000  0.000  1.0
  Pt  Pt24  1  0.001  0.500  0.287  1.0
  Pt  Pt25  1  0.999  0.500  0.713  1.0
  Pt  Pt26  1  0.500  0.500  0.000  1.0
  Pt  Pt27  1  0.000  0.500  0.000  1.0
[/CIF]
.
The structure described by Pt3Ti is Uranium Silicide-like structured and crystallizes in the trigonal P-3m1 space group. There are four inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to three Pt(1,1); three equivalent Pt(2); and six equivalent Pt(3) atoms to form TiPt12 cuboctahedra that share corners with three equivalent Ti(3)Pt12 cuboctahedra; corners with six equivalent Ti(1)Pt12 cuboctahedra; corners with six equivalent Pt(4)Ti4Pt8 cuboctahedra; edges with six equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with nine Pt(1,1)Ti4Pt8 cuboctahedra;  a faceface with one Ti(4)Pt12 cuboctahedra; faces with three equivalent Ti(2)Pt12 cuboctahedra; faces with three equivalent Ti(3)Pt12 cuboctahedra; faces with three Pt(1,1)Ti4Pt8 cuboctahedra; and faces with six equivalent Pt(3)Ti4Pt8 cuboctahedra. In the second Ti site, Ti(2) is bonded to three equivalent Pt(3), three equivalent Pt(4), and six equivalent Pt(2) atoms to form TiPt12 cuboctahedra that share corners with three equivalent Ti(3)Pt12 cuboctahedra; corners with nine equivalent Ti(2)Pt12 cuboctahedra; edges with three Pt(1,1)Ti4Pt8 cuboctahedra; edges with six equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with six equivalent Pt(4)Ti4Pt8 cuboctahedra; faces with three equivalent Ti(1)Pt12 cuboctahedra; faces with three equivalent Ti(4)Pt12 cuboctahedra; faces with three equivalent Pt(3)Ti4Pt8 cuboctahedra; and faces with three equivalent Pt(4)Ti4Pt8 cuboctahedra. In the third Ti site, Ti(3) is bonded to three equivalent Pt(3) and nine Pt(1,1) atoms to form TiPt12 cuboctahedra that share corners with three equivalent Ti(1)Pt12 cuboctahedra; corners with three equivalent Ti(2)Pt12 cuboctahedra; corners with six equivalent Ti(3)Pt12 cuboctahedra; edges with nine equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with twelve Pt(1,1)Ti4Pt8 cuboctahedra; faces with three equivalent Ti(1)Pt12 cuboctahedra; faces with three equivalent Ti(3)Pt12 cuboctahedra; faces with three equivalent Pt(3)Ti4Pt8 cuboctahedra; and faces with nine Pt(1,1)Ti4Pt8 cuboctahedra. In the fourth Ti site, Ti(4) is bonded to six equivalent Pt(2) and six equivalent Pt(4) atoms to form TiPt12 cuboctahedra that share corners with six equivalent Ti(4)Pt12 cuboctahedra, corners with twelve equivalent Pt(3)Ti4Pt8 cuboctahedra, edges with six equivalent Pt(4)Ti4Pt8 cuboctahedra, faces with two equivalent Ti(1)Pt12 cuboctahedra, faces with six equivalent Ti(2)Pt12 cuboctahedra, and faces with six equivalent Pt(4)Ti4Pt8 cuboctahedra. There are five inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Ti(1); three equivalent Ti(3); two equivalent Pt(3); and six Pt(1,1) atoms to form distorted PtTi4Pt8 cuboctahedra that share corners with three equivalent Pt(3)Ti4Pt8 cuboctahedra; corners with six equivalent Pt(1)Ti4Pt8 cuboctahedra;  an edgeedge with one Ti(2)Pt12 cuboctahedra; edges with three equivalent Ti(1)Pt12 cuboctahedra; edges with four equivalent Ti(3)Pt12 cuboctahedra; edges with six equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with eight Pt(1,1)Ti4Pt8 cuboctahedra;  a faceface with one Ti(1)Pt12 cuboctahedra; faces with three equivalent Ti(3)Pt12 cuboctahedra; faces with five equivalent Pt(3)Ti4Pt8 cuboctahedra; and faces with nine Pt(1,1)Ti4Pt8 cuboctahedra. In the second Pt site, Pt(2) is bonded in a distorted see-saw-like geometry to one Ti(1), one Ti(4), two equivalent Ti(2), two equivalent Pt(3), and two equivalent Pt(4) atoms. In the third Pt site, Pt(3) is bonded to one Ti(2); one Ti(3); two equivalent Ti(1); two Pt(1,1); two equivalent Pt(2); and four equivalent Pt(3) atoms to form distorted PtTi4Pt8 cuboctahedra that share corners with two equivalent Ti(4)Pt12 cuboctahedra; corners with three equivalent Pt(1)Ti4Pt8 cuboctahedra; corners with four equivalent Pt(4)Ti4Pt8 cuboctahedra; corners with six equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with two equivalent Ti(1)Pt12 cuboctahedra; edges with two equivalent Ti(2)Pt12 cuboctahedra; edges with three equivalent Ti(3)Pt12 cuboctahedra; edges with four equivalent Pt(3)Ti4Pt8 cuboctahedra; edges with six Pt(1,1)Ti4Pt8 cuboctahedra;  a faceface with one Ti(2)Pt12 cuboctahedra;  a faceface with one Ti(3)Pt12 cuboctahedra;  a faceface with one Pt(4)Ti4Pt8 cuboctahedra; faces with two equivalent Ti(1)Pt12 cuboctahedra; faces with four equivalent Pt(3)Ti4Pt8 cuboctahedra; and faces with five Pt(1,1)Ti4Pt8 cuboctahedra. In the fourth Pt site, Pt(1) is bonded to one Ti(1), three equivalent Ti(3), two equivalent Pt(3), and six equivalent Pt(1) atoms to form distorted PtTi4Pt8 cuboctahedra that share corners with three equivalent Pt(3)Ti4Pt8 cuboctahedra, corners with six equivalent Pt(1)Ti4Pt8 cuboctahedra,  an edgeedge with one Ti(2)Pt12 cuboctahedra, edges with three equivalent Ti(1)Pt12 cuboctahedra, edges with four equivalent Ti(3)Pt12 cuboctahedra, edges with six equivalent Pt(3)Ti4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Ti4Pt8 cuboctahedra,  a faceface with one Ti(1)Pt12 cuboctahedra, faces with three equivalent Ti(3)Pt12 cuboctahedra, faces with five equivalent Pt(3)Ti4Pt8 cuboctahedra, and faces with nine equivalent Pt(1)Ti4Pt8 cuboctahedra. In the fifth Pt site, Pt(4) is bonded to two equivalent Ti(2), two equivalent Ti(4), four equivalent Pt(2), and four equivalent Pt(4) atoms to form distorted PtTi4Pt8 cuboctahedra that share corners with four equivalent Ti(1)Pt12 cuboctahedra, corners with six equivalent Pt(4)Ti4Pt8 cuboctahedra, corners with eight equivalent Pt(3)Ti4Pt8 cuboctahedra, edges with two equivalent Ti(4)Pt12 cuboctahedra, edges with four equivalent Ti(2)Pt12 cuboctahedra, edges with four equivalent Pt(4)Ti4Pt8 cuboctahedra, faces with two equivalent Ti(2)Pt12 cuboctahedra, faces with two equivalent Ti(4)Pt12 cuboctahedra, faces with two equivalent Pt(3)Ti4Pt8 cuboctahedra, and faces with four equivalent Pt(4)Ti4Pt8 cuboctahedra. is represented by the CIF card [CIF]
data_TiPt3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.551
_cell_length_b   5.551
_cell_length_c   15.857
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   423.162
_cell_formula_units_Z   7
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
  Ti  Ti0  1  0.000  0.000  0.720  1.0
  Ti  Ti1  1  0.667  0.333  0.856  1.0
  Ti  Ti2  1  0.333  0.667  0.144  1.0
  Ti  Ti3  1  0.000  0.000  0.280  1.0
  Ti  Ti4  1  0.667  0.333  0.430  1.0
  Ti  Ti5  1  0.000  0.000  0.000  1.0
  Ti  Ti6  1  0.333  0.667  0.570  1.0
  Pt  Pt7  1  0.833  0.666  0.571  1.0
  Pt  Pt8  1  0.334  0.167  0.571  1.0
  Pt  Pt9  1  0.167  0.333  0.857  1.0
  Pt  Pt10  1  0.167  0.334  0.429  1.0
  Pt  Pt11  1  0.167  0.833  0.429  1.0
  Pt  Pt12  1  0.500  0.001  0.713  1.0
  Pt  Pt13  1  0.666  0.833  0.429  1.0
  Pt  Pt14  1  0.167  0.833  0.857  1.0
  Pt  Pt15  1  0.667  0.833  0.857  1.0
  Pt  Pt16  1  0.833  0.167  0.143  1.0
  Pt  Pt17  1  0.833  0.167  0.571  1.0
  Pt  Pt18  1  0.500  0.500  0.713  1.0
  Pt  Pt19  1  0.333  0.167  0.143  1.0
  Pt  Pt20  1  0.833  0.667  0.143  1.0
  Pt  Pt21  1  0.500  0.500  0.287  1.0
  Pt  Pt22  1  0.500  0.999  0.287  1.0
  Pt  Pt23  1  0.500  0.000  0.000  1.0
  Pt  Pt24  1  0.001  0.500  0.287  1.0
  Pt  Pt25  1  0.999  0.500  0.713  1.0
  Pt  Pt26  1  0.500  0.500  0.000  1.0
  Pt  Pt27  1  0.000  0.500  0.000  1.0
[/CIF]
.