Pt3Al crystallizes in the tetragonal P4/mbm space group. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 4-coordinate geometry to four equivalent Pt(2) and four equivalent Al(1) atoms. In the second Pt site, Pt(2) is bonded in a 14-coordinate geometry to two equivalent Pt(2), four equivalent Pt(1), four equivalent Pt(3), and four equivalent Al(1) atoms. In the third Pt site, Pt(3) is bonded in a 2-coordinate geometry to four equivalent Pt(2) and four equivalent Al(1) atoms. Al(1) is bonded in a 8-coordinate geometry to four equivalent Pt(1), four equivalent Pt(2), and four equivalent Pt(3) atoms.
Pt3Al crystallizes in the tetragonal P4/mbm space group. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 4-coordinate geometry to four equivalent Pt(2) and four equivalent Al(1) atoms. All Pt(1)-Pt(2) bond lengths are 2.74 Å. There are two shorter (2.62 Å) and two longer (2.83 Å) Pt(1)-Al(1) bond lengths. In the second Pt site, Pt(2) is bonded in a 14-coordinate geometry to two equivalent Pt(2), four equivalent Pt(1), four equivalent Pt(3), and four equivalent Al(1) atoms. There is one shorter (2.87 Å) and one longer (2.89 Å) Pt(2)-Pt(2) bond length. All Pt(2)-Pt(3) bond lengths are 2.74 Å. All Pt(2)-Al(1) bond lengths are 3.29 Å. In the third Pt site, Pt(3) is bonded in a 2-coordinate geometry to four equivalent Pt(2) and four equivalent Al(1) atoms. There are two shorter (2.54 Å) and two longer (2.97 Å) Pt(3)-Al(1) bond lengths. Al(1) is bonded in a 8-coordinate geometry to four equivalent Pt(1), four equivalent Pt(2), and four equivalent Pt(3) atoms.