DOE OSTI2020
V4HO10H3O2 crystallizes in the monoclinic Cm space group. The structure is two-dimensional and consists of two water water molecules and one V4HO10 sheet oriented in the (0, 0, 1) direction. In the V4HO10 sheet, there are four inequivalent V5+ sites. In the first V5+ site, V5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 1.72–2.44 Å. In the second V5+ site, V5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 1.61–2.48 Å. In the third V5+ site, V5+ is bonded in a 5-coordinate geometry to five O2- atoms. There are a spread of V–O bond distances ranging from 1.59–2.07 Å. In the fourth V5+ site, V5+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of V–O bond distances ranging from 1.60–2.48 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted T-shaped geometry to three V5+ atoms. In the second O2- site, O2- is bonded in a distorted T-shaped geometry to three V5+ atoms. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three V5+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to three V5+ atoms. In the fifth O2- site, O2- is bonded in a 4-coordinate geometry to four V5+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to three V5+ atoms. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one V5+ and one H1+ atom. In the eighth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the ninth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom. In the tenth O2- site, O2- is bonded in a single-bond geometry to one V5+ atom.