Ho3Ni2 crystallizes in the trigonal R-3 space group. There are three inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in an octahedral geometry to six equivalent Ni(1) atoms. In the second Ho site, Ho(2) is bonded in a 6-coordinate geometry to six equivalent Ni(1) atoms. In the third Ho site, Ho(3) is bonded in a 5-coordinate geometry to five equivalent Ni(1) atoms. Ni(1) is bonded in a 9-coordinate geometry to one Ho(1), two equivalent Ho(2), five equivalent Ho(3), and one Ni(1) atom.
Ho3Ni2 crystallizes in the trigonal R-3 space group. There are three inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in an octahedral geometry to six equivalent Ni(1) atoms. All Ho(1)-Ni(1) bond lengths are 2.90 Å. In the second Ho site, Ho(2) is bonded in a 6-coordinate geometry to six equivalent Ni(1) atoms. There are three shorter (2.75 Å) and three longer (2.90 Å) Ho(2)-Ni(1) bond lengths. In the third Ho site, Ho(3) is bonded in a 5-coordinate geometry to five equivalent Ni(1) atoms. There are a spread of Ho(3)-Ni(1) bond distances ranging from 2.81-3.31 Å. Ni(1) is bonded in a 9-coordinate geometry to one Ho(1), two equivalent Ho(2), five equivalent Ho(3), and one Ni(1) atom. The Ni(1)-Ni(1) bond length is 2.52 Å.