Materials Data on CsSi3HO7 by Materials Project
CsHSi3O7 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Cs1+ is bonded in a 1-coordinate geometry to one H1+ and eight O2- atoms. The Cs–H bond length is 3.21 Å. There are a spread of Cs–O bond distances ranging from 3.05–3.67 Å. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There is three shorter (1.63 Å) and one longer (1.64 Å) Si–O bond length. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There is one shorter (1.59 Å) and three longer (1.66 Å) Si–O bond length. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form corner-sharing SiO4 tetrahedra. There is one shorter (1.62 Å) and three longer (1.64 Å) Si–O bond length. H1+ is bonded in a linear geometry to one Cs1+ and two O2- atoms. There is one shorter (1.06 Å) and one longer (1.44 Å) H–O bond length. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent Cs1+, one Si4+, and one H1+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one Cs1+ and two Si4+ atoms. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one Cs1+ and two equivalent Si4+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Cs1+, one Si4+, and one H1+ atom. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Cs1+ and two Si4+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Cs1+ and two Si4+ atoms. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two Si4+ atoms.