Materials Data on NbH8N2OF5 by Materials Project
(NH4)2NbOF5 is Silicon tetrafluoride-derived structured and crystallizes in the monoclinic Cc space group. The structure is zero-dimensional and consists of sixteen ammonium molecules and eight NbOF5 clusters. In each NbOF5 cluster, Nb5+ is bonded in a distorted octahedral geometry to one O2- and five F1- atoms. The Nb–O bond length is 1.78 Å. There are a spread of Nb–F bond distances ranging from 1.97–2.20 Å. O2- is bonded in a single-bond geometry to one Nb5+ atom. There are five inequivalent F1- sites. In the first F1- site, F1- is bonded in a 1-coordinate geometry to one Nb5+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Nb5+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Nb5+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one Nb5+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one Nb5+ atom.