Materials Data on Ho2(B2Rh3)3 by Materials Project

Abstract

Ho2(Rh3B2)3 crystallizes in the hexagonal P6/mmm space group. The structure is three-dimensional. Ho is bonded in a 12-coordinate geometry to one Ho, twelve Rh, and six equivalent B atoms. The Ho–Ho bond length is 3.50 Å. There are six shorter (3.01 Å) and six longer (3.30 Å) Ho–Rh bond lengths. All Ho–B bond lengths are 3.24 Å. There are two inequivalent Rh sites. In the first Rh site, Rh is bonded in a 4-coordinate geometry to two equivalent Ho and four B atoms. There are two shorter (2.14 Å) and two longer (2.16 Å) Rh–B bond lengths. In the second Rh site, Rh is bonded in a distorted square co-planar geometry to four equivalent Ho and four equivalent B atoms. All Rh–B bond lengths are 2.16 Å. There are two inequivalent B sites. In the first B site, B is bonded to six equivalent Rh atoms to form distorted edge-sharing BRh6 pentagonal pyramids. In the second B site, B is bonded in a 6-coordinate geometry to three equivalent Ho and six Rh atoms.