Materials Data on Si2Cl2O3 by Materials Project
Si2O3Cl2 is beta Polonium structured and crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of three perchlorooctasilsesquioxane molecules. there are two inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to three O2- and one Cl1- atom to form corner-sharing SiClO3 tetrahedra. All Si–O bond lengths are 1.63 Å. The Si–Cl bond length is 2.02 Å. In the second Si4+ site, Si4+ is bonded to three equivalent O2- and one Cl1- atom to form corner-sharing SiClO3 tetrahedra. All Si–O bond lengths are 1.63 Å. The Si–Cl bond length is 2.02 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Si4+ atoms. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two Si4+ atoms. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Si4+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Si4+ atom.