Materials Data on KB5O8 by Materials Project

Abstract

KB5O8 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. K1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of K–O bond distances ranging from 2.57–3.09 Å. There are five inequivalent B3+ sites. In the first B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.34–1.53 Å. In the second B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.30–1.49 Å. In the third B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of B–O bond distances ranging from 1.44–1.51 Å. In the fourth B3+ site, B3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of B–O bond distances ranging from 1.32–1.49 Å. In the fifth B3+ site, B3+ is bonded in a linear geometry to two O2- atoms. Both B–O bond lengths are 1.27 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to two B3+ atoms. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one K1+ and one B3+ atom. In the fifth O2- site, O2- is bonded in a distorted L-shaped geometry to one K1+ and one B3+ atom. In the sixth O2- site, O2- is bonded in a distorted water-like geometry to one K1+ and two B3+ atoms. In the seventh O2- site, O2- is bonded in a trigonal planar geometry to three B3+ atoms. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to two B3+ atoms.