Materials Data on Ca3SiO by Materials Project

Abstract

Ca3SiO crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Ca2+ sites. In the first Ca2+ site, Ca2+ is bonded in a distorted linear geometry to four equivalent Si4- and two equivalent O2- atoms. There are a spread of Ca–Si bond distances ranging from 3.19–3.51 Å. Both Ca–O bond lengths are 2.37 Å. In the second Ca2+ site, Ca2+ is bonded in a distorted linear geometry to four equivalent Si4- and two equivalent O2- atoms. There are a spread of Ca–Si bond distances ranging from 3.13–3.57 Å. Both Ca–O bond lengths are 2.37 Å. Si4- is bonded in a 12-coordinate geometry to twelve Ca2+ atoms. O2- is bonded to six Ca2+ atoms to form corner-sharing OCa6 octahedra. The corner-sharing octahedra tilt angles range from 8–11°.