Materials Data on Sr3SiO5 by Materials Project

Abstract

Sr3SiO5 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. there are two inequivalent Sr2+ sites. In the first Sr2+ site, Sr2+ is bonded in a 10-coordinate geometry to ten O2- atoms. There are two shorter (2.73 Å) and eight longer (2.89 Å) Sr–O bond lengths. In the second Sr2+ site, Sr2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Sr–O bond distances ranging from 2.49–2.81 Å. Si4+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All Si–O bond lengths are 1.65 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to six Sr2+ atoms to form corner-sharing OSr6 octahedra. The corner-sharing octahedra tilt angles range from 0–30°. In the second O2- site, O2- is bonded in a 1-coordinate geometry to five Sr2+ and one Si4+ atom.