Materials Data on Ho2B3O8 by Materials Project

Abstract

Ho2B3O8 crystallizes in the orthorhombic Pbcn space group. The structure is three-dimensional. Ho is bonded in a 7-coordinate geometry to seven O atoms. There are a spread of Ho–O bond distances ranging from 2.31–2.42 Å. There are two inequivalent B sites. In the first B site, B is bonded to four O atoms to form corner-sharing BO4 tetrahedra. There is two shorter (1.48 Å) and two longer (1.49 Å) B–O bond length. In the second B site, B is bonded to four O atoms to form corner-sharing BO4 tetrahedra. There are a spread of B–O bond distances ranging from 1.44–1.51 Å. There are four inequivalent O sites. In the first O site, O is bonded in a distorted bent 120 degrees geometry to one Ho and two B atoms. In the second O site, O is bonded in a distorted single-bond geometry to two equivalent Ho and one B atom. In the third O site, O is bonded in a distorted single-bond geometry to three equivalent Ho and one B atom. In the fourth O site, O is bonded in a distorted bent 120 degrees geometry to one Ho and two equivalent B atoms.