Materials Data on NaH4BrO2 by Materials Project
NaH4O2Br crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one NaH4O2Br sheet oriented in the (1, 0, 0) direction. Na1+ is bonded to four O2- and two equivalent Br1- atoms to form distorted edge-sharing NaBr2O4 octahedra. There are a spread of Na–O bond distances ranging from 2.41–2.50 Å. There are one shorter (3.03 Å) and one longer (3.04 Å) Na–Br bond lengths. 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 0.99 Å. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 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 two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Na1+ and two H1+ atoms. In the second O2- site, O2- is bonded in a distorted water-like geometry to two equivalent Na1+ and two H1+ atoms. Br1- is bonded in a 2-coordinate geometry to two equivalent Na1+ atoms.