ChemInform Abstract: Na₆Si₂O₇ — The Missing Structural Link Among Alkali Pyrosilicates.

Abstract

Na 6 Si 2 O 7 -The Missing Structural Link Among Alkali Pyrosilicates. -The structure of the title compound is determined by single crystal XRD for the first time. Na6Si2O7 crystallizes in the triclinic space group P1 with Z = 8. A characteristic feature of the crystals obtained from a stoichiometric Na2O/SiO2 melt is a twinning by reticular pseudomerohedry, which simulates a much larger monoclinic unit cell. Na6Si2O7 belongs to the family of sorosilicates, i.e. it is based on Si 2 O 7 groups, which are arranged in layers parallel to (100). -(KAHLENBERG*, V.; LANGREITER, T.; ARROYABE, E.