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DOE OSTI2020

Materials Data on HoAsO4 by Materials Project

HoAsO4 is Zircon structured and crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Ho3+ is bonded in a 8-coordinate geometry to eight equivalent O2- atoms. There are four shorter (2.31 Å) and four longer (2.42 Å) Ho–O bond lengths. As5+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All As–O bond lengths are 1.72 Å. O2- is bonded in a 3-coordinate geometry to two equivalent Ho3+ and one As5+ atom.

36 MATERIALS SCIENCE↗

DOE OSTI2020

Materials Data on Ho(AsO)2 by Materials Project

Ho(AsO)2 crystallizes in the tetragonal I4_1/amd space group. The structure is zero-dimensional and consists of eight Ho(AsO)2 clusters. Ho3+ is bonded in a linear geometry to two equivalent O2- atoms. Both Ho–O bond lengths are 2.11 Å. As+0.50+ is bonded in a single-bond geometry to one O2- atom. The As–O bond length is 1.78 Å. O2- is bonded in a distorted linear geometry to one Ho3+ and one As+0.50+ atom.

36 MATERIALS SCIENCE↗