Materials Data on K2Ge(IO3)6 by Materials Project
K2Ge(O3I)6 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.83–3.10 Å. Ge4+ is bonded in an octahedral geometry to six equivalent O2- atoms. All Ge–O bond lengths are 1.93 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Ge4+, and one I5+ atom. The O–I bond length is 1.92 Å. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one K1+ and one I5+ atom. The O–I bond length is 1.83 Å. In the third O2- site, O2- is bonded in a distorted single-bond geometry to one K1+ and one I5+ atom. The O–I bond length is 1.83 Å. I5+ is bonded in a 3-coordinate geometry to three O2- atoms.