Materials Data on KAl(SO10)2 by Materials Project

KAlO12(SO4)2 crystallizes in the cubic Pa-3 space group. The structure is three-dimensional and consists of eight sulfuric acid molecules and one KAlO12 framework. In the KAlO12 framework, K is bonded in a distorted octahedral geometry to six equivalent O atoms. All K–O bond lengths are 3.33 Å. Al is bonded in an octahedral geometry to six equivalent O atoms. All Al–O bond lengths are 1.94 Å. There are two inequivalent O sites. In the first O site, O is bonded in a water-like geometry to one K and one O atom. The O–O bond length is 1.27 Å. In the second O site, O is bonded in a distorted bent 120 degrees geometry to one Al and one O atom.