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ChemInform Abstract: The First Synthetic Microporous Yttrium Silicate Containing Framework Sodium Ions.

✍ Scribed by J. ROCHA; P. FERREIRA; Z. LIN; P. BRANDAO; A. FERREIRA; J. D. PEDROSA DE JESUS

Publisher: John Wiley and Sons
Year: 2010
Weight: 35 KB
Volume: 29
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.199807273

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✦ Synopsis

The First Synthetic Microporous Yttrium Silicate Containing Framework Sodium Ions.

-A synthetic analogue of the mineral montregianite of the composition Na 2 KYSi 8 O 19 •5H 2 O is prepared for the first time by hydrothermal synthesis from a mixture of SiO 2 , Na 2 O, H 2 O, KOH, NaOH, NaCl and Y 2 (SO 4 ) 3 •8H 2 O at 230 • C. Characterization by powder XRD, 29 Si and 23 Na solid state MAS NMR, FT-IR, TG and DSC methods show that the structure (monoclinic, P2 1 /n, Z = 2) is identical with that of montregianite, where Na + cations are integrated into the framework structure. This is contrary to the structure of zeolites where the Na cations usually reside within the channels.

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