Materials Data on KNO3 by Materials Project

Abstract

KNO3 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 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.78–3.03 Å. In the second K1+ site, K1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of K–O bond distances ranging from 2.76–3.00 Å. There are two inequivalent N5+ sites. In the first N5+ site, N5+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.27 Å) and one longer (1.28 Å) N–O bond length. In the second N5+ site, N5+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.26 Å) and two longer (1.27 Å) N–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two K1+ and one N5+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to three K1+ and one N5+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two K1+ and one N5+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to three K1+ and one N5+ atom. In the fifth O2- site, O2- is bonded in a distorted single-bond geometry to three K1+ and one N5+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent K1+ and one N5+ atom.