Materials Data on AlB5H16(NO7)2 by Materials Project
Al(BO2)5(NH4)2(H2O)4 crystallizes in the orthorhombic C222_1 space group. The structure is three-dimensional and consists of eight ammonium molecules, sixteen water molecules, and one Al(BO2)5 framework. In the Al(BO2)5 framework, Al3+ is bonded in a tetrahedral geometry to four O2- atoms. All Al–O bond lengths are 1.76 Å. There are three 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 1.35–1.41 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 1.34–1.41 Å. In the third B3+ site, B3+ is bonded in a tetrahedral geometry to four O2- atoms. All B–O bond lengths are 1.48 Å. There are five inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees 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 Al3+ and one B3+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Al3+ and one B3+ atom.