Pt3Al is Uranium Silicide-like structured and crystallizes in the tetragonal P4/mbm 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 Al(1) atoms to form distorted PtAl4Pt8 cuboctahedra that share corners with twelve equivalent Pt(1)Al4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Al4Pt8 cuboctahedra, edges with eight equivalent Pt(2)Al4Pt8 cuboctahedra, edges with eight equivalent Al(1)Pt12 cuboctahedra, faces with four equivalent Pt(2)Al4Pt8 cuboctahedra, faces with four equivalent Al(1)Pt12 cuboctahedra, and faces with ten equivalent Pt(1)Al4Pt8 cuboctahedra. In the second Pt site, Pt(2) is bonded to eight equivalent Pt(1) and four equivalent Al(1) atoms to form distorted PtAl4Pt8 cuboctahedra that share corners with twelve equivalent Pt(2)Al4Pt8 cuboctahedra, edges with eight equivalent Al(1)Pt12 cuboctahedra, edges with sixteen equivalent Pt(1)Al4Pt8 cuboctahedra, faces with four equivalent Al(1)Pt12 cuboctahedra, faces with six equivalent Pt(2)Al4Pt8 cuboctahedra, and faces with eight equivalent Pt(1)Al4Pt8 cuboctahedra. Al(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form AlPt12 cuboctahedra that share corners with twelve equivalent Al(1)Pt12 cuboctahedra, edges with eight equivalent Pt(2)Al4Pt8 cuboctahedra, edges with sixteen equivalent Pt(1)Al4Pt8 cuboctahedra, faces with four equivalent Pt(2)Al4Pt8 cuboctahedra, faces with six equivalent Al(1)Pt12 cuboctahedra, and faces with eight equivalent Pt(1)Al4Pt8 cuboctahedra.
Pt3Al is Uranium Silicide-like structured and crystallizes in the tetragonal P4/mbm 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 Al(1) atoms to form distorted PtAl4Pt8 cuboctahedra that share corners with twelve equivalent Pt(1)Al4Pt8 cuboctahedra, edges with eight equivalent Pt(1)Al4Pt8 cuboctahedra, edges with eight equivalent Pt(2)Al4Pt8 cuboctahedra, edges with eight equivalent Al(1)Pt12 cuboctahedra, faces with four equivalent Pt(2)Al4Pt8 cuboctahedra, faces with four equivalent Al(1)Pt12 cuboctahedra, and faces with ten equivalent Pt(1)Al4Pt8 cuboctahedra. All Pt(1)-Pt(1) bond lengths are 2.77 Å. All Pt(1)-Pt(2) bond lengths are 2.78 Å. There are two shorter (2.71 Å) and two longer (2.85 Å) Pt(1)-Al(1) bond lengths. In the second Pt site, Pt(2) is bonded to eight equivalent Pt(1) and four equivalent Al(1) atoms to form distorted PtAl4Pt8 cuboctahedra that share corners with twelve equivalent Pt(2)Al4Pt8 cuboctahedra, edges with eight equivalent Al(1)Pt12 cuboctahedra, edges with sixteen equivalent Pt(1)Al4Pt8 cuboctahedra, faces with four equivalent Al(1)Pt12 cuboctahedra, faces with six equivalent Pt(2)Al4Pt8 cuboctahedra, and faces with eight equivalent Pt(1)Al4Pt8 cuboctahedra. All Pt(2)-Al(1) bond lengths are 2.77 Å. Al(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form AlPt12 cuboctahedra that share corners with twelve equivalent Al(1)Pt12 cuboctahedra, edges with eight equivalent Pt(2)Al4Pt8 cuboctahedra, edges with sixteen equivalent Pt(1)Al4Pt8 cuboctahedra, faces with four equivalent Pt(2)Al4Pt8 cuboctahedra, faces with six equivalent Al(1)Pt12 cuboctahedra, and faces with eight equivalent Pt(1)Al4Pt8 cuboctahedra.