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HoPt3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ho is bonded to twelve equivalent Pt atoms to form a mixture of face and corner-sharing HoPt12 cuboctahedra. All Ho–Pt bond lengths are 2.91 Å. Pt is bonded in a distorted square co-planar geometry to four equivalent Ho atoms.
HoPt2 is Cubic Laves structured and crystallizes in the cubic Fd-3m space group. The structure is three-dimensional. Ho is bonded in a 12-coordinate geometry to twelve equivalent Pt atoms. All Ho–Pt bond lengths are 3.18 Å. Pt is bonded to six equivalent Ho and six equivalent Pt atoms to form a mixture of face, edge, and corner-sharing PtHo6Pt6 cuboctahedra. All Pt–Pt bond lengths are 2.72 Å.
HoPt is alpha-derived structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ho is bonded in a 7-coordinate geometry to seven equivalent Pt atoms. There are a spread of Ho–Pt bond distances ranging from 2.86–3.02 Å. Pt is bonded in a 7-coordinate geometry to seven equivalent Ho atoms.