Pt2Si crystallizes in the hexagonal P-62m space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 5-coordinate geometry to one Si(2) and four equivalent Si(1) atoms. In the second Pt site, Pt(2) is bonded to two equivalent Si(1) and two equivalent Si(2) atoms to form a mixture of distorted edge and corner-sharing PtSi4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent Pt(2) and six equivalent Pt(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent Pt(1) and six equivalent Pt(2) atoms.
Pt2Si crystallizes in the hexagonal P-62m space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 5-coordinate geometry to one Si(2) and four equivalent Si(1) atoms. The Pt(1)-Si(2) bond length is 2.49 Å. All Pt(1)-Si(1) bond lengths are 2.73 Å. In the second Pt site, Pt(2) is bonded to two equivalent Si(1) and two equivalent Si(2) atoms to form a mixture of distorted edge and corner-sharing PtSi4 tetrahedra. Both Pt(2)-Si(1) bond lengths are 2.39 Å. Both Pt(2)-Si(2) bond lengths are 2.56 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to three equivalent Pt(2) and six equivalent Pt(1) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to three equivalent Pt(1) and six equivalent Pt(2) atoms.