Synthesis and characterization of a new one-dimensional sodium silicate named Mu-29

Abstract

The synthesis and the structure of a new one-dimensional sodium silicate, named Mu-29, are reported. This material was prepared in a quasi-non-aqueous medium using ethanol as the main solvent. Its structure was determined by single crystal X-ray diffraction. The symmetry is orthorhombic, space group Pna2 1, with the following unit-cell parameters: a=27.32(2) Å, b=15.40(2) Å and c=8.241(8) Å. Mu-29 is a new chain-like silicate. Its structure consists of double-crankshaft––[Si 2O 5] 2−––chains which are in strong interaction with hydrogen atoms and sodium cations. The material was characterized by elemental and thermal analyses, XRD, SEM and 1H, 23Na and 29Si solid state NMR spectroscopy.