Materials Data on Ho2SiSeO4 by Materials Project
Ho2SiSeO4 crystallizes in the orthorhombic Pbcm space group. The structure is three-dimensional. there are two inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded in a 6-coordinate geometry to two equivalent Se2- and six O2- atoms. Both Ho–Se bond lengths are 3.03 Å. There are a spread of Ho–O bond distances ranging from 2.34–2.43 Å. In the second Ho3+ site, Ho3+ is bonded in a 8-coordinate geometry to two equivalent Se2- and six O2- atoms. There are one shorter (2.86 Å) and one longer (2.96 Å) Ho–Se bond lengths. There are a spread of Ho–O bond distances ranging from 2.38–2.54 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There is two shorter (1.64 Å) and two longer (1.65 Å) Si–O bond length. Se2- is bonded in a 4-coordinate geometry to four Ho3+ atoms. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three Ho3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a 1-coordinate geometry to three Ho3+ and one Si4+ atom.