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HoZn is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Ho is bonded in a body-centered cubic geometry to eight equivalent Zn atoms. All Ho–Zn bond lengths are 3.08 Å. Zn is bonded in a body-centered cubic geometry to eight equivalent Ho atoms.
Ho2Zn17 crystallizes in the trigonal R-3m space group. The structure is three-dimensional. Ho is bonded in a 10-coordinate geometry to nineteen Zn atoms. There are a spread of Ho–Zn bond distances ranging from 3.10–3.45 Å. There are four inequivalent Zn sites. In the first Zn site, Zn is bonded to three equivalent Ho and nine Zn atoms to form distorted ZnHo3Zn9 cuboctahedra that share corners with twenty-three ZnHo2Zn10 cuboctahedra, edges with ten ZnHo2Zn10 cuboctahedra, and faces with twenty ZnHo3Zn9 cuboctahedra. There are a spread of Zn–Zn bond distances ranging from 2.54–2.86 Å. In the second Zn site, Zn is bonded in a 2-coordinate geometry to one Ho and thirteen Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.64–2.98 Å. In the third Zn site, Zn is bonded to two equivalent Ho and ten Zn atoms to form ZnHo2Zn10 cuboctahedra that share corners with twenty-two ZnHo2Zn10 cuboctahedra, edges with ten ZnHo2Zn10 cuboctahedra, and faces with eighteen ZnHo3Zn9 cuboctahedra. All Zn–Zn bond lengths are 2.59 Å. In the fourth Zn site, Zn is bonded to two equivalent Ho and ten Zn atoms to form distorted ZnHo2Zn10 cuboctahedra that share corners with twenty-four ZnHo2Zn10 cuboctahedra, edges with five ZnHo2Zn10 cuboctahedra, and faces with twenty-one ZnHo3Zn9 cuboctahedra. Both Zn–Zn bond lengths are 2.67 Å.
HoZn3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ho is bonded in a 11-coordinate geometry to fourteen Zn atoms. There are a spread of Ho–Zn bond distances ranging from 2.98–3.44 Å. There are three inequivalent Zn sites. In the first Zn site, Zn is bonded in a 10-coordinate geometry to four equivalent Ho and six Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.59–2.81 Å. In the second Zn site, Zn is bonded in a 12-coordinate geometry to five equivalent Ho and seven Zn atoms. There are a spread of Zn–Zn bond distances ranging from 2.60–3.06 Å. In the third Zn site, Zn is bonded in a 10-coordinate geometry to five equivalent Ho and five Zn atoms.