Materials Data on K2CoH4(I2O7)2 by Materials Project

Abstract

K2CoH4(O7I2)2 crystallizes in the monoclinic C2 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 2.76–3.22 Å. In the second 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 2.81–2.96 Å. Co2+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Co–O bond distances ranging from 2.09–2.17 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.70 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.65 Å) H–O bond length. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one H1+, and one I5+ atom. The O–I bond length is 1.83 Å. In the second O2- site, O2- is bonded in a bent 120 degrees geometry to one K1+, one Co2+, and one I5+ atom. The O–I bond length is 1.86 Å. In the third O2- site, O2- is bonded in a 4-coordinate geometry to two K1+ and two I5+ atoms. There are one shorter (1.83 Å) and one longer (2.74 Å) O–I bond lengths. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Co2+ and two equivalent H1+ atoms. In the fifth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Co2+ and two equivalent H1+ atoms. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to two K1+ and two I5+ atoms. There are one shorter (1.84 Å) and one longer (2.69 Å) O–I bond lengths. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one H1+, and one I5+ atom. The O–I bond length is 1.84 Å. In the eighth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one K1+, one Co2+, and one I5+ atom. The O–I bond length is 1.84 Å. There are two inequivalent I5+ sites. In the first I5+ site, I5+ is bonded in a 3-coordinate geometry to four O2- atoms. In the second I5+ site, I5+ is bonded in a 3-coordinate geometry to four O2- atoms.