Materials Data on HoNi4B by Materials Project
HoNi4B crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. there are two inequivalent Ho sites. In the first Ho site, Ho is bonded in a distorted hexagonal planar geometry to six equivalent Ni atoms. All Ho–Ni bond lengths are 2.86 Å. In the second Ho site, Ho is bonded in a 12-coordinate geometry to twelve equivalent Ni and six equivalent B atoms. All Ho–Ni bond lengths are 2.87 Å. All Ho–B bond lengths are 2.86 Å. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a distorted L-shaped geometry to two equivalent Ho, two equivalent Ni, and two equivalent B atoms. Both Ni–Ni bond lengths are 2.48 Å. Both Ni–B bond lengths are 2.03 Å. In the second Ni site, Ni is bonded in a 12-coordinate geometry to three equivalent Ho and nine Ni atoms. All Ni–Ni bond lengths are 2.86 Å. B is bonded in a 6-coordinate geometry to three equivalent Ho and six equivalent Ni atoms.