Materials Data on ErNi4B by Materials Project
ErNi4B crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. there are two inequivalent Er sites. In the first Er site, Er is bonded in a 12-coordinate geometry to twelve equivalent Ni and six equivalent B atoms. All Er–Ni bond lengths are 2.86 Å. All Er–B bond lengths are 2.85 Å. In the second Er site, Er is bonded in a distorted hexagonal planar geometry to six equivalent Ni atoms. All Er–Ni bond lengths are 2.85 Å. There are two inequivalent Ni sites. In the first Ni site, Ni is bonded in a 12-coordinate geometry to three equivalent Er and nine Ni atoms. There are six shorter (2.48 Å) and three longer (2.85 Å) Ni–Ni bond lengths. In the second Ni site, Ni is bonded in a distorted L-shaped geometry to two equivalent Er, two equivalent Ni, and two equivalent B atoms. Both Ni–B bond lengths are 2.03 Å. B is bonded in a 6-coordinate geometry to three equivalent Er and six equivalent Ni atoms.