Ho2(PtSi)3 crystallizes in the tetragonal P4/mmm space group. Ho(1) is bonded to four equivalent Ho(1), one Pt(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing HoHo4SiPt octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted linear geometry to one Ho(1) and one Si(2) atom. In the second Pt site, Pt(2) is bonded in a distorted linear geometry to two equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted linear geometry to one Ho(1) and one Pt(2) atom. In the second Si site, Si(2) is bonded in a distorted linear geometry to two equivalent Pt(1) atoms.
Ho2(PtSi)3 crystallizes in the tetragonal P4/mmm space group. Ho(1) is bonded to four equivalent Ho(1), one Pt(1), and one Si(1) atom to form a mixture of distorted corner and edge-sharing HoHo4SiPt octahedra. The corner-sharing octahedra are not tilted. All Ho(1)-Ho(1) bond lengths are 2.79 Å. The Ho(1)-Pt(1) bond length is 2.72 Å. The Ho(1)-Si(1) bond length is 2.89 Å. There are two inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a distorted linear geometry to one Ho(1) and one Si(2) atom. The Pt(1)-Si(2) bond length is 2.39 Å. In the second Pt site, Pt(2) is bonded in a distorted linear geometry to two equivalent Si(1) atoms. Both Pt(2)-Si(1) bond lengths are 2.34 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a distorted linear geometry to one Ho(1) and one Pt(2) atom. In the second Si site, Si(2) is bonded in a distorted linear geometry to two equivalent Pt(1) atoms.