Materials Data on KHSeO4 by Materials Project
KHSeO4 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.80–3.25 Å. In the second K1+ site, K1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of K–O bond distances ranging from 2.75–3.09 Å. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.03 Å) and one longer (1.58 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.54 Å) H–O bond length. There are two inequivalent Se6+ sites. In the first Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.65–1.78 Å. In the second Se6+ site, Se6+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Se–O bond distances ranging from 1.64–1.77 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to three K1+ and one Se6+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two K1+ and one Se6+ atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to three K1+ and one Se6+ atom. In the fourth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+ and one Se6+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one H1+, and one Se6+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one H1+, and one Se6+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to two K1+, one H1+, and one Se6+ atom. In the eighth O2- site, O2- is bonded in a 1-coordinate geometry to two K1+, one H1+, and one Se6+ atom.