Pt5InSi crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 4-coordinate geometry to two equivalent In(1) and two equivalent Si(1) atoms. In the second Pt site, Pt(2) is bonded in a distorted square co-planar geometry to four equivalent In(1) atoms. In(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form a mixture of corner and face-sharing InPt12 cuboctahedra. Si(1) is bonded in a body-centered cubic geometry to eight equivalent Pt(1) atoms.
Pt5InSi crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 4-coordinate geometry to two equivalent In(1) and two equivalent Si(1) atoms. Both Pt(1)-In(1) bond lengths are 2.89 Å. Both Pt(1)-Si(1) bond lengths are 2.45 Å. In the second Pt site, Pt(2) is bonded in a distorted square co-planar geometry to four equivalent In(1) atoms. All Pt(2)-In(1) bond lengths are 2.80 Å. In(1) is bonded to four equivalent Pt(2) and eight equivalent Pt(1) atoms to form a mixture of corner and face-sharing InPt12 cuboctahedra. Si(1) is bonded in a body-centered cubic geometry to eight equivalent Pt(1) atoms.