Materials Data on ErH4I3O11 by Materials Project
ErH4O11I3 crystallizes in the triclinic P-1 space group. The structure is one-dimensional and consists of one ErH4O11I3 ribbon oriented in the (1, 0, 0) direction. Er3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Er–O bond distances ranging from 2.29–2.47 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to two I5+ atoms. There are one shorter (1.85 Å) and one longer (2.53 Å) O–I bond lengths. In the second O2- site, O2- is bonded in a distorted water-like geometry to one Er3+ and two H1+ atoms. In the third O2- site, O2- is bonded in a distorted water-like geometry to one Er3+ and two H1+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Er3+ and one I5+ atom. The O–I bond length is 1.86 Å. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Er3+ and one I5+ atom. The O–I bond length is 1.85 Å. In the sixth O2- site, O2- is bonded in a distorted single-bond geometry to one I5+ atom. The O–I bond length is 1.81 Å. In the seventh O2- site, O2- is bonded in a bent 120 degrees geometry to one Er3+ and one I5+ atom. The O–I bond length is 1.84 Å. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Er3+ and one I5+ atom. The O–I bond length is 1.84 Å. In the ninth O2- site, O2- is bonded in a bent 120 degrees geometry to one Er3+ and one I5+ atom. The O–I bond length is 1.84 Å. In the tenth O2- site, O2- is bonded in a 2-coordinate geometry to one Er3+ and one I5+ atom. The O–I bond length is 1.86 Å. In the eleventh O2- site, O2- is bonded in a single-bond geometry to one I5+ atom. The O–I bond length is 1.82 Å. There are three inequivalent I5+ sites. In the first I5+ site, I5+ is bonded in a 4-coordinate geometry to four O2- atoms. In the second I5+ site, I5+ is bonded in a 3-coordinate geometry to three O2- atoms. In the third I5+ site, I5+ is bonded in a 3-coordinate geometry to three O2- atoms.