Materials Data on KNb3F9 by Materials Project
KNb3F9 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 6-coordinate geometry to six F1- atoms. There are a spread of K–F bond distances ranging from 3.06–3.22 Å. In the second K1+ site, K1+ is bonded in a 6-coordinate geometry to six F1- atoms. There are a spread of K–F bond distances ranging from 3.09–3.29 Å. There are six inequivalent Nb+2.67+ sites. In the first Nb+2.67+ site, Nb+2.67+ is bonded to six F1- atoms to form corner-sharing NbF6 octahedra. The corner-sharing octahedra tilt angles range from 21–45°. There are a spread of Nb–F bond distances ranging from 2.12–2.17 Å. In the second Nb+2.67+ site, Nb+2.67+ is bonded to six F1- atoms to form corner-sharing NbF6 octahedra. The corner-sharing octahedra tilt angles range from 20–45°. There are a spread of Nb–F bond distances ranging from 2.12–2.17 Å. In the third Nb+2.67+ site, Nb+2.67+ is bonded to six F1- atoms to form corner-sharing NbF6 octahedra. The corner-sharing octahedra tilt angles range from 15–45°. There are a spread of Nb–F bond distances ranging from 2.10–2.16 Å. In the fourth Nb+2.67+ site, Nb+2.67+ is bonded to six F1- atoms to form corner-sharing NbF6 octahedra. The corner-sharing octahedra tilt angles range from 15–45°. There are a spread of Nb–F bond distances ranging from 2.10–2.17 Å. In the fifth Nb+2.67+ site, Nb+2.67+ is bonded to six F1- atoms to form corner-sharing NbF6 octahedra. The corner-sharing octahedra tilt angles range from 20–44°. There are a spread of Nb–F bond distances ranging from 2.12–2.16 Å. In the sixth Nb+2.67+ site, Nb+2.67+ is bonded to six F1- atoms to form corner-sharing NbF6 octahedra. The corner-sharing octahedra tilt angles range from 21–45°. There are a spread of Nb–F bond distances ranging from 2.12–2.16 Å. There are eighteen inequivalent F1- sites. In the first F1- site, F1- is bonded in a bent 150 degrees geometry to two Nb+2.67+ atoms. In the second F1- site, F1- is bonded in a bent 150 degrees geometry to two Nb+2.67+ atoms. In the third F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the fourth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the fifth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the sixth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the seventh F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the eighth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the ninth F1- site, F1- is bonded in a linear geometry to two Nb+2.67+ atoms. In the tenth F1- site, F1- is bonded in a linear geometry to two Nb+2.67+ atoms. In the eleventh F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the twelfth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the thirteenth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the fourteenth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the fifteenth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the sixteenth F1- site, F1- is bonded in a 2-coordinate geometry to one K1+ and two Nb+2.67+ atoms. In the seventeenth F1- site, F1- is bonded in a bent 150 degrees geometry to two Nb+2.67+ atoms. In the eighteenth F1- site, F1- is bonded in a bent 150 degrees geometry to two Nb+2.67+ atoms.