Materials Data on Y2SiCO7 by Materials Project

Abstract

Y2SiCO7 is Zircon-derived structured and crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are two inequivalent Y3+ sites. In the first Y3+ site, Y3+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Y–O bond distances ranging from 2.27–2.46 Å. In the second Y3+ site, Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Y–O bond distances ranging from 2.31–2.50 Å. Si4+ is bonded in a tetrahedral geometry to four O2- atoms. There are a spread of Si–O bond distances ranging from 1.63–1.68 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is two shorter (1.29 Å) and one longer (1.31 Å) C–O bond length. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent Y3+ and one Si4+ atom. In the second O2- site, O2- is bonded in a distorted single-bond geometry to two Y3+ and one C4+ atom. In the third O2- site, O2- is bonded in a distorted single-bond geometry to two Y3+ and one C4+ atom. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to two Y3+ and one C4+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to two Y3+ and one Si4+ atom. In the sixth O2- site, O2- is bonded in a 4-coordinate geometry to three Y3+ and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Y3+ and one Si4+ atom.