Materials Data on NaTi2SiH4O9 by Materials Project
(NaTi2SiO7)2(H2)2(H2O)2O2 crystallizes in the tetragonal P4_2/mcm space group. The structure is three-dimensional and consists of four hydrogen molecules, two hydrogen peroxide molecules, four water molecules, and one NaTi2SiO7 framework. In the NaTi2SiO7 framework, Na is bonded in a 6-coordinate geometry to four equivalent O atoms. All Na–O bond lengths are 2.48 Å. Ti is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ti–O bond distances ranging from 1.85–2.24 Å. Si is bonded in a tetrahedral geometry to four equivalent O atoms. All Si–O bond lengths are 1.64 Å. There are three inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to one Na, one Ti, and one Si atom. In the second O site, O is bonded in a distorted trigonal non-coplanar geometry to three equivalent Ti atoms. In the third O site, O is bonded in a linear geometry to two equivalent Ti atoms.