Materials Data on NbCuO3F by Materials Project
NbCuO3F crystallizes in the triclinic P-1 space group. The structure is three-dimensional. Nb5+ is bonded in a 6-coordinate geometry to five O2- and one F1- atom. There are a spread of Nb–O bond distances ranging from 1.80–2.34 Å. The Nb–F bond length is 2.15 Å. Cu2+ is bonded in a distorted rectangular see-saw-like geometry to three O2- and two equivalent F1- atoms. There are a spread of Cu–O bond distances ranging from 1.88–1.98 Å. There are one shorter (1.99 Å) and one longer (2.66 Å) Cu–F bond lengths. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to three equivalent Nb5+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Nb5+ and two equivalent Cu2+ atoms. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Nb5+ and one Cu2+ atom. F1- is bonded in a 2-coordinate geometry to one Nb5+ and two equivalent Cu2+ atoms.