The material described by PtSi2P2 is Hausmannite-derived structured and crystallizes in the monoclinic P2_1 space group. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Si(1), one Si(3), one Si(5), one P(4), one P(5), and one P(6) atom to form PtSi3P3 octahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra, corners with two equivalent Pt(2)Si3P3 octahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra, corners with two equivalent Si(6)Si2PPt tetrahedra, corners with two equivalent P(3)SiP2Pt tetrahedra, corners with three equivalent Si(7)Si3P tetrahedra,  an edgeedge with one Pt(2)Si3P3 octahedra, and  an edgeedge with one Pt(4)Si3P3 octahedra. The corner-sharing octahedral tilt angles range from 58-62°. In the second Pt site, Pt(2) is bonded to one Si(3), one Si(5), one Si(8), one P(3), one P(4), and one P(5) atom to form PtSi3P3 octahedra that share  a cornercorner with one Pt(4)Si3P3 octahedra, corners with two equivalent Pt(1)Si3P3 octahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra,  a cornercorner with one P(2)SiPPt2 tetrahedra,  a cornercorner with one P(8)SiPPt2 tetrahedra, corners with two equivalent Si(7)Si3P tetrahedra, corners with two equivalent P(6)SiP2Pt tetrahedra, corners with three equivalent Si(6)Si2PPt tetrahedra, and  an edgeedge with one Pt(1)Si3P3 octahedra. The corner-sharing octahedral tilt angles range from 58-65°. In the third Pt site, Pt(3) is bonded to one Si(1), one Si(2), one Si(6), one P(2), one P(7), and one P(8) atom to form PtSi3P3 octahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra, corners with two equivalent Pt(4)Si3P3 octahedra,  a cornercorner with one Si(3)Si2Pt2 tetrahedra,  a cornercorner with one Si(5)Si2Pt2 tetrahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra, corners with two equivalent Si(4)SiP2Pt tetrahedra, corners with two equivalent P(1)SiP3 tetrahedra, corners with three equivalent Si(8)P3Pt tetrahedra, and  an edgeedge with one Pt(4)Si3P3 octahedra. The corner-sharing octahedral tilt angles range from 53-61°. In the fourth Pt site, Pt(4) is bonded to one Si(1), one Si(2), one Si(4), one P(2), one P(4), and one P(8) atom to form PtSi3P3 octahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra, corners with two equivalent Pt(3)Si3P3 octahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra, corners with two equivalent Si(8)P3Pt tetrahedra, corners with two equivalent P(7)Si3Pt tetrahedra, corners with three equivalent P(1)SiP3 tetrahedra,  an edgeedge with one Pt(1)Si3P3 octahedra, and  an edgeedge with one Pt(3)Si3P3 octahedra. The corner-sharing octahedral tilt angles range from 53-65°. There are eight inequivalent Si sites. In the first Si site, Si(1) is bonded to one Pt(1), one Pt(3), one Pt(4), and one Si(4) atom to form distorted SiSiPt3 tetrahedra that share  a cornercorner with one Pt(4)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(3)Si2Pt2 tetrahedra,  a cornercorner with one Si(5)Si2Pt2 tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra, corners with two equivalent Si(2)SiPPt2 tetrahedra, corners with two equivalent P(7)Si3Pt tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, corners with two equivalent P(8)SiPPt2 tetrahedra, and  an edgeedge with one P(4)PPt3 tetrahedra. The corner-sharing octahedral tilt angles are 69°. In the second Si site, Si(2) is bonded to one Pt(3), one Pt(4), one Si(7), and one P(7) atom to form distorted SiSiPPt2 tetrahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(3)Si2Pt2 tetrahedra,  a cornercorner with one Si(5)Si2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra, corners with two equivalent Si(4)SiP2Pt tetrahedra, corners with two equivalent Si(1)SiPt3 tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, and corners with two equivalent P(8)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles are 68°. In the third Si site, Si(3) is bonded to one Pt(1), one Pt(2), one Si(6), and one Si(7) atom to form distorted SiSi2Pt2 tetrahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, corners with two equivalent P(5)P2Pt2 tetrahedra, corners with two equivalent P(4)PPt3 tetrahedra, corners with two equivalent P(3)SiP2Pt tetrahedra, corners with two equivalent P(6)SiP2Pt tetrahedra, and  an edgeedge with one Si(5)Si2Pt2 tetrahedra. The corner-sharing octahedral tilt angles are 69°. In the fourth Si site, Si(4) is bonded to one Pt(4), one Si(1), one P(1), and one P(7) atom to form distorted SiSiP2Pt tetrahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra,  a cornercorner with one Pt(4)Si3P3 octahedra, corners with two equivalent Pt(3)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra, corners with two equivalent Si(2)SiPPt2 tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, and corners with two equivalent P(8)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles range from 68-81°. In the fifth Si site, Si(5) is bonded to one Pt(1), one Pt(2), one Si(6), and one Si(7) atom to form distorted SiSi2Pt2 tetrahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent P(5)P2Pt2 tetrahedra, corners with two equivalent P(4)PPt3 tetrahedra, corners with two equivalent P(3)SiP2Pt tetrahedra, corners with two equivalent P(6)SiP2Pt tetrahedra, and  an edgeedge with one Si(3)Si2Pt2 tetrahedra. The corner-sharing octahedral tilt angles are 63°. In the sixth Si site, Si(6) is bonded to one Pt(3), one Si(3), one Si(5), and one P(3) atom to form distorted SiSi2PPt tetrahedra that share corners with two equivalent Pt(1)Si3P3 octahedra, corners with three equivalent Pt(2)Si3P3 octahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra,  a cornercorner with one P(2)SiPPt2 tetrahedra,  a cornercorner with one P(8)SiPPt2 tetrahedra, and corners with two equivalent Si(7)Si3P tetrahedra. The corner-sharing octahedral tilt angles range from 47-70°. In the seventh Si site, Si(7) is bonded to one Si(2), one Si(3), one Si(5), and one P(6) atom to form distorted SiSi3P tetrahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra,  a cornercorner with one Pt(4)Si3P3 octahedra, corners with two equivalent Pt(2)Si3P3 octahedra, corners with three equivalent Pt(1)Si3P3 octahedra,  a cornercorner with one P(4)PPt3 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra, and corners with two equivalent Si(6)Si2PPt tetrahedra. The corner-sharing octahedral tilt angles range from 53-77°. In the eighth Si site, Si(8) is bonded to one Pt(2), one P(2), one P(7), and one P(8) atom to form SiP3Pt tetrahedra that share corners with two equivalent Pt(4)Si3P3 octahedra, corners with three equivalent Pt(3)Si3P3 octahedra,  a cornercorner with one Si(3)Si2Pt2 tetrahedra,  a cornercorner with one Si(5)Si2Pt2 tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra, and corners with two equivalent P(1)SiP3 tetrahedra. The corner-sharing octahedral tilt angles range from 48-69°. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one Si(4), one P(2), one P(5), and one P(8) atom to form distorted PSiP3 tetrahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra,  a cornercorner with one Pt(2)Si3P3 octahedra, corners with two equivalent Pt(3)Si3P3 octahedra, corners with three equivalent Pt(4)Si3P3 octahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra, and corners with two equivalent Si(8)P3Pt tetrahedra. The corner-sharing octahedral tilt angles range from 56-76°. In the second P site, P(2) is bonded to one Pt(3), one Pt(4), one Si(8), and one P(1) atom to form distorted PSiPPt2 tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra, corners with two equivalent Si(4)SiP2Pt tetrahedra, corners with two equivalent Si(2)SiPPt2 tetrahedra, corners with two equivalent Si(1)SiPt3 tetrahedra, corners with two equivalent P(7)Si3Pt tetrahedra, corners with two equivalent P(8)SiPPt2 tetrahedra, and  an edgeedge with one P(8)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles are 74°. In the third P site, P(3) is bonded to one Pt(2), one Si(6), one P(5), and one P(6) atom to form distorted PSiP2Pt tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Pt(3)Si3P3 octahedra, corners with two equivalent Pt(1)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, and corners with two equivalent P(4)PPt3 tetrahedra. The corner-sharing octahedral tilt angles range from 57-69°. In the fourth P site, P(4) is bonded to one Pt(1), one Pt(2), one Pt(4), and one P(6) atom to form PPPt3 tetrahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra,  a cornercorner with one P(2)SiPPt2 tetrahedra,  a cornercorner with one P(8)SiPPt2 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, corners with two equivalent P(5)P2Pt2 tetrahedra, corners with two equivalent P(3)SiP2Pt tetrahedra, and  an edgeedge with one Si(1)SiPt3 tetrahedra. The corner-sharing octahedral tilt angles are 70°. In the fifth P site, P(5) is bonded to one Pt(1), one Pt(2), one P(1), and one P(3) atom to form PP2Pt2 tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra,  a cornercorner with one P(2)SiPPt2 tetrahedra,  a cornercorner with one P(8)SiPPt2 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, corners with two equivalent P(4)PPt3 tetrahedra, and corners with two equivalent P(6)SiP2Pt tetrahedra. The corner-sharing octahedral tilt angles are 72°. In the sixth P site, P(6) is bonded to one Pt(1), one Si(7), one P(3), and one P(4) atom to form distorted PSiP2Pt tetrahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra,  a cornercorner with one Pt(4)Si3P3 octahedra, corners with two equivalent Pt(2)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, and corners with two equivalent P(5)P2Pt2 tetrahedra. The corner-sharing octahedral tilt angles range from 67-76°. In the seventh P site, P(7) is bonded to one Pt(3), one Si(2), one Si(4), and one Si(8) atom to form PSi3Pt tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Pt(3)Si3P3 octahedra, corners with two equivalent Pt(4)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra, corners with two equivalent Si(1)SiPt3 tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, and corners with two equivalent P(8)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles range from 52-72°. In the eighth P site, P(8) is bonded to one Pt(3), one Pt(4), one Si(8), and one P(1) atom to form distorted PSiPPt2 tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra, corners with two equivalent Si(4)SiP2Pt tetrahedra, corners with two equivalent Si(2)SiPPt2 tetrahedra, corners with two equivalent Si(1)SiPt3 tetrahedra, corners with two equivalent P(7)Si3Pt tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, and  an edgeedge with one P(2)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles are 66°. is represented by the CIF file [CIF]
data_Si2P2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.614
_cell_length_b   6.067
_cell_length_c   12.121
_cell_angle_alpha   77.017
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   688.917
_cell_formula_units_Z   8
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
  Si  Si0  1  0.558  0.961  0.178  1.0
  Si  Si1  1  0.058  0.039  0.822  1.0
  Si  Si2  1  0.210  0.550  0.830  1.0
  Si  Si3  1  0.710  0.450  0.170  1.0
  Si  Si4  1  0.685  0.749  0.437  1.0
  Si  Si5  1  0.185  0.251  0.563  1.0
  Si  Si6  1  0.914  0.745  0.916  1.0
  Si  Si7  1  0.414  0.255  0.084  1.0
  Si  Si8  1  0.433  0.758  0.575  1.0
  Si  Si9  1  0.933  0.242  0.425  1.0
  Si  Si10  1  0.363  0.034  0.668  1.0
  Si  Si11  1  0.863  0.966  0.332  1.0
  Si  Si12  1  0.235  0.558  0.639  1.0
  Si  Si13  1  0.735  0.442  0.361  1.0
  Si  Si14  1  0.574  0.453  0.837  1.0
  Si  Si15  1  0.074  0.547  0.163  1.0
  P  P16  1  0.710  0.929  0.861  1.0
  P  P17  1  0.210  0.071  0.139  1.0
  P  P18  1  0.250  0.766  0.069  1.0
  P  P19  1  0.750  0.234  0.931  1.0
  P  P20  1  0.564  0.239  0.610  1.0
  P  P21  1  0.064  0.761  0.390  1.0
  P  P22  1  0.401  0.549  0.325  1.0
  P  P23  1  0.901  0.451  0.675  1.0
  P  P24  1  0.728  0.954  0.671  1.0
  P  P25  1  0.228  0.046  0.329  1.0
  P  P26  1  0.036  0.748  0.581  1.0
  P  P27  1  0.536  0.252  0.419  1.0
  P  P28  1  0.371  0.271  0.897  1.0
  P  P29  1  0.871  0.729  0.103  1.0
  P  P30  1  0.022  0.266  0.073  1.0
  P  P31  1  0.522  0.734  0.927  1.0
  Pt  Pt32  1  0.960  0.093  0.627  1.0
  Pt  Pt33  1  0.460  0.907  0.373  1.0
  Pt  Pt34  1  0.655  0.587  0.643  1.0
  Pt  Pt35  1  0.155  0.413  0.357  1.0
  Pt  Pt36  1  0.298  0.910  0.863  1.0
  Pt  Pt37  1  0.798  0.090  0.137  1.0
  Pt  Pt38  1  0.480  0.609  0.128  1.0
  Pt  Pt39  1  0.980  0.391  0.872  1.0
[/CIF]
.
The material described by PtSi2P2 is Hausmannite-derived structured and crystallizes in the monoclinic P2_1 space group. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Si(1), one Si(3), one Si(5), one P(4), one P(5), and one P(6) atom to form PtSi3P3 octahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra, corners with two equivalent Pt(2)Si3P3 octahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra, corners with two equivalent Si(6)Si2PPt tetrahedra, corners with two equivalent P(3)SiP2Pt tetrahedra, corners with three equivalent Si(7)Si3P tetrahedra,  an edgeedge with one Pt(2)Si3P3 octahedra, and  an edgeedge with one Pt(4)Si3P3 octahedra. The corner-sharing octahedral tilt angles range from 58-62°. In the second Pt site, Pt(2) is bonded to one Si(3), one Si(5), one Si(8), one P(3), one P(4), and one P(5) atom to form PtSi3P3 octahedra that share  a cornercorner with one Pt(4)Si3P3 octahedra, corners with two equivalent Pt(1)Si3P3 octahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra,  a cornercorner with one P(2)SiPPt2 tetrahedra,  a cornercorner with one P(8)SiPPt2 tetrahedra, corners with two equivalent Si(7)Si3P tetrahedra, corners with two equivalent P(6)SiP2Pt tetrahedra, corners with three equivalent Si(6)Si2PPt tetrahedra, and  an edgeedge with one Pt(1)Si3P3 octahedra. The corner-sharing octahedral tilt angles range from 58-65°. In the third Pt site, Pt(3) is bonded to one Si(1), one Si(2), one Si(6), one P(2), one P(7), and one P(8) atom to form PtSi3P3 octahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra, corners with two equivalent Pt(4)Si3P3 octahedra,  a cornercorner with one Si(3)Si2Pt2 tetrahedra,  a cornercorner with one Si(5)Si2Pt2 tetrahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra, corners with two equivalent Si(4)SiP2Pt tetrahedra, corners with two equivalent P(1)SiP3 tetrahedra, corners with three equivalent Si(8)P3Pt tetrahedra, and  an edgeedge with one Pt(4)Si3P3 octahedra. The corner-sharing octahedral tilt angles range from 53-61°. In the fourth Pt site, Pt(4) is bonded to one Si(1), one Si(2), one Si(4), one P(2), one P(4), and one P(8) atom to form PtSi3P3 octahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra, corners with two equivalent Pt(3)Si3P3 octahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra, corners with two equivalent Si(8)P3Pt tetrahedra, corners with two equivalent P(7)Si3Pt tetrahedra, corners with three equivalent P(1)SiP3 tetrahedra,  an edgeedge with one Pt(1)Si3P3 octahedra, and  an edgeedge with one Pt(3)Si3P3 octahedra. The corner-sharing octahedral tilt angles range from 53-65°. There are eight inequivalent Si sites. In the first Si site, Si(1) is bonded to one Pt(1), one Pt(3), one Pt(4), and one Si(4) atom to form distorted SiSiPt3 tetrahedra that share  a cornercorner with one Pt(4)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(3)Si2Pt2 tetrahedra,  a cornercorner with one Si(5)Si2Pt2 tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra, corners with two equivalent Si(2)SiPPt2 tetrahedra, corners with two equivalent P(7)Si3Pt tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, corners with two equivalent P(8)SiPPt2 tetrahedra, and  an edgeedge with one P(4)PPt3 tetrahedra. The corner-sharing octahedral tilt angles are 69°. In the second Si site, Si(2) is bonded to one Pt(3), one Pt(4), one Si(7), and one P(7) atom to form distorted SiSiPPt2 tetrahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(3)Si2Pt2 tetrahedra,  a cornercorner with one Si(5)Si2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra, corners with two equivalent Si(4)SiP2Pt tetrahedra, corners with two equivalent Si(1)SiPt3 tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, and corners with two equivalent P(8)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles are 68°. In the third Si site, Si(3) is bonded to one Pt(1), one Pt(2), one Si(6), and one Si(7) atom to form distorted SiSi2Pt2 tetrahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, corners with two equivalent P(5)P2Pt2 tetrahedra, corners with two equivalent P(4)PPt3 tetrahedra, corners with two equivalent P(3)SiP2Pt tetrahedra, corners with two equivalent P(6)SiP2Pt tetrahedra, and  an edgeedge with one Si(5)Si2Pt2 tetrahedra. The corner-sharing octahedral tilt angles are 69°. In the fourth Si site, Si(4) is bonded to one Pt(4), one Si(1), one P(1), and one P(7) atom to form distorted SiSiP2Pt tetrahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra,  a cornercorner with one Pt(4)Si3P3 octahedra, corners with two equivalent Pt(3)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra, corners with two equivalent Si(2)SiPPt2 tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, and corners with two equivalent P(8)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles range from 68-81°. In the fifth Si site, Si(5) is bonded to one Pt(1), one Pt(2), one Si(6), and one Si(7) atom to form distorted SiSi2Pt2 tetrahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent P(5)P2Pt2 tetrahedra, corners with two equivalent P(4)PPt3 tetrahedra, corners with two equivalent P(3)SiP2Pt tetrahedra, corners with two equivalent P(6)SiP2Pt tetrahedra, and  an edgeedge with one Si(3)Si2Pt2 tetrahedra. The corner-sharing octahedral tilt angles are 63°. In the sixth Si site, Si(6) is bonded to one Pt(3), one Si(3), one Si(5), and one P(3) atom to form distorted SiSi2PPt tetrahedra that share corners with two equivalent Pt(1)Si3P3 octahedra, corners with three equivalent Pt(2)Si3P3 octahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra,  a cornercorner with one P(2)SiPPt2 tetrahedra,  a cornercorner with one P(8)SiPPt2 tetrahedra, and corners with two equivalent Si(7)Si3P tetrahedra. The corner-sharing octahedral tilt angles range from 47-70°. In the seventh Si site, Si(7) is bonded to one Si(2), one Si(3), one Si(5), and one P(6) atom to form distorted SiSi3P tetrahedra that share  a cornercorner with one Pt(3)Si3P3 octahedra,  a cornercorner with one Pt(4)Si3P3 octahedra, corners with two equivalent Pt(2)Si3P3 octahedra, corners with three equivalent Pt(1)Si3P3 octahedra,  a cornercorner with one P(4)PPt3 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra, and corners with two equivalent Si(6)Si2PPt tetrahedra. The corner-sharing octahedral tilt angles range from 53-77°. In the eighth Si site, Si(8) is bonded to one Pt(2), one P(2), one P(7), and one P(8) atom to form SiP3Pt tetrahedra that share corners with two equivalent Pt(4)Si3P3 octahedra, corners with three equivalent Pt(3)Si3P3 octahedra,  a cornercorner with one Si(3)Si2Pt2 tetrahedra,  a cornercorner with one Si(5)Si2Pt2 tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra, and corners with two equivalent P(1)SiP3 tetrahedra. The corner-sharing octahedral tilt angles range from 48-69°. There are eight inequivalent P sites. In the first P site, P(1) is bonded to one Si(4), one P(2), one P(5), and one P(8) atom to form distorted PSiP3 tetrahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra,  a cornercorner with one Pt(2)Si3P3 octahedra, corners with two equivalent Pt(3)Si3P3 octahedra, corners with three equivalent Pt(4)Si3P3 octahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(7)Si3Pt tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra, and corners with two equivalent Si(8)P3Pt tetrahedra. The corner-sharing octahedral tilt angles range from 56-76°. In the second P site, P(2) is bonded to one Pt(3), one Pt(4), one Si(8), and one P(1) atom to form distorted PSiPPt2 tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra, corners with two equivalent Si(4)SiP2Pt tetrahedra, corners with two equivalent Si(2)SiPPt2 tetrahedra, corners with two equivalent Si(1)SiPt3 tetrahedra, corners with two equivalent P(7)Si3Pt tetrahedra, corners with two equivalent P(8)SiPPt2 tetrahedra, and  an edgeedge with one P(8)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles are 74°. In the third P site, P(3) is bonded to one Pt(2), one Si(6), one P(5), and one P(6) atom to form distorted PSiP2Pt tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Pt(3)Si3P3 octahedra, corners with two equivalent Pt(1)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, and corners with two equivalent P(4)PPt3 tetrahedra. The corner-sharing octahedral tilt angles range from 57-69°. In the fourth P site, P(4) is bonded to one Pt(1), one Pt(2), one Pt(4), and one P(6) atom to form PPPt3 tetrahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one P(6)SiP2Pt tetrahedra,  a cornercorner with one P(2)SiPPt2 tetrahedra,  a cornercorner with one P(8)SiPPt2 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, corners with two equivalent P(5)P2Pt2 tetrahedra, corners with two equivalent P(3)SiP2Pt tetrahedra, and  an edgeedge with one Si(1)SiPt3 tetrahedra. The corner-sharing octahedral tilt angles are 70°. In the fifth P site, P(5) is bonded to one Pt(1), one Pt(2), one P(1), and one P(3) atom to form PP2Pt2 tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Si(8)P3Pt tetrahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(4)SiP2Pt tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(3)SiP2Pt tetrahedra,  a cornercorner with one P(2)SiPPt2 tetrahedra,  a cornercorner with one P(8)SiPPt2 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, corners with two equivalent P(4)PPt3 tetrahedra, and corners with two equivalent P(6)SiP2Pt tetrahedra. The corner-sharing octahedral tilt angles are 72°. In the sixth P site, P(6) is bonded to one Pt(1), one Si(7), one P(3), and one P(4) atom to form distorted PSiP2Pt tetrahedra that share  a cornercorner with one Pt(1)Si3P3 octahedra,  a cornercorner with one Pt(4)Si3P3 octahedra, corners with two equivalent Pt(2)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one Si(1)SiPt3 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra, corners with two equivalent Si(3)Si2Pt2 tetrahedra, corners with two equivalent Si(5)Si2Pt2 tetrahedra, and corners with two equivalent P(5)P2Pt2 tetrahedra. The corner-sharing octahedral tilt angles range from 67-76°. In the seventh P site, P(7) is bonded to one Pt(3), one Si(2), one Si(4), and one Si(8) atom to form PSi3Pt tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Pt(3)Si3P3 octahedra, corners with two equivalent Pt(4)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one Si(7)Si3P tetrahedra,  a cornercorner with one Si(2)SiPPt2 tetrahedra,  a cornercorner with one P(1)SiP3 tetrahedra, corners with two equivalent Si(1)SiPt3 tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, and corners with two equivalent P(8)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles range from 52-72°. In the eighth P site, P(8) is bonded to one Pt(3), one Pt(4), one Si(8), and one P(1) atom to form distorted PSiPPt2 tetrahedra that share  a cornercorner with one Pt(2)Si3P3 octahedra,  a cornercorner with one Si(6)Si2PPt tetrahedra,  a cornercorner with one P(5)P2Pt2 tetrahedra,  a cornercorner with one P(4)PPt3 tetrahedra, corners with two equivalent Si(4)SiP2Pt tetrahedra, corners with two equivalent Si(2)SiPPt2 tetrahedra, corners with two equivalent Si(1)SiPt3 tetrahedra, corners with two equivalent P(7)Si3Pt tetrahedra, corners with two equivalent P(2)SiPPt2 tetrahedra, and  an edgeedge with one P(2)SiPPt2 tetrahedra. The corner-sharing octahedral tilt angles are 66°. is represented by the CIF file [CIF]
data_Si2P2Pt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.614
_cell_length_b   6.067
_cell_length_c   12.121
_cell_angle_alpha   77.017
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   688.917
_cell_formula_units_Z   8
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
  Si  Si0  1  0.558  0.961  0.178  1.0
  Si  Si1  1  0.058  0.039  0.822  1.0
  Si  Si2  1  0.210  0.550  0.830  1.0
  Si  Si3  1  0.710  0.450  0.170  1.0
  Si  Si4  1  0.685  0.749  0.437  1.0
  Si  Si5  1  0.185  0.251  0.563  1.0
  Si  Si6  1  0.914  0.745  0.916  1.0
  Si  Si7  1  0.414  0.255  0.084  1.0
  Si  Si8  1  0.433  0.758  0.575  1.0
  Si  Si9  1  0.933  0.242  0.425  1.0
  Si  Si10  1  0.363  0.034  0.668  1.0
  Si  Si11  1  0.863  0.966  0.332  1.0
  Si  Si12  1  0.235  0.558  0.639  1.0
  Si  Si13  1  0.735  0.442  0.361  1.0
  Si  Si14  1  0.574  0.453  0.837  1.0
  Si  Si15  1  0.074  0.547  0.163  1.0
  P  P16  1  0.710  0.929  0.861  1.0
  P  P17  1  0.210  0.071  0.139  1.0
  P  P18  1  0.250  0.766  0.069  1.0
  P  P19  1  0.750  0.234  0.931  1.0
  P  P20  1  0.564  0.239  0.610  1.0
  P  P21  1  0.064  0.761  0.390  1.0
  P  P22  1  0.401  0.549  0.325  1.0
  P  P23  1  0.901  0.451  0.675  1.0
  P  P24  1  0.728  0.954  0.671  1.0
  P  P25  1  0.228  0.046  0.329  1.0
  P  P26  1  0.036  0.748  0.581  1.0
  P  P27  1  0.536  0.252  0.419  1.0
  P  P28  1  0.371  0.271  0.897  1.0
  P  P29  1  0.871  0.729  0.103  1.0
  P  P30  1  0.022  0.266  0.073  1.0
  P  P31  1  0.522  0.734  0.927  1.0
  Pt  Pt32  1  0.960  0.093  0.627  1.0
  Pt  Pt33  1  0.460  0.907  0.373  1.0
  Pt  Pt34  1  0.655  0.587  0.643  1.0
  Pt  Pt35  1  0.155  0.413  0.357  1.0
  Pt  Pt36  1  0.298  0.910  0.863  1.0
  Pt  Pt37  1  0.798  0.090  0.137  1.0
  Pt  Pt38  1  0.480  0.609  0.128  1.0
  Pt  Pt39  1  0.980  0.391  0.872  1.0
[/CIF]
.