Materials Data on KSiHO3 by Materials Project
KSiHO3 crystallizes in the orthorhombic Cmce 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 one H1+ and eight O2- atoms. The K–H bond length is 2.67 Å. There are a spread of K–O bond distances ranging from 2.70–3.11 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to two equivalent H1+ and six O2- atoms. Both K–H bond lengths are 2.85 Å. There are a spread of K–O bond distances ranging from 2.77–3.08 Å. There are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There are a spread of Si–O bond distances ranging from 1.59–1.67 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There is two shorter (1.62 Å) and two longer (1.67 Å) Si–O bond length. There are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted linear geometry to one K1+ and two O2- atoms. There is one shorter (1.03 Å) and one longer (1.50 Å) H–O bond length. In the second H1+ site, H1+ is bonded in a linear geometry to two equivalent K1+ and two equivalent O2- atoms. Both H–O bond lengths are 1.21 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent K1+, one Si4+, and one H1+ atom. In the second O2- site, O2- is bonded in a distorted linear geometry to four K1+, one Si4+, and one H1+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two K1+ and two Si4+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two K1+, one Si4+, and one H1+ atom.