New sodalite frameworks; synthetic tugtupite and a beryllosilicate framework with a 3 : 1 Si : Be ratio


Armstrong, J.A. and Weller, M.T. (2006) New sodalite frameworks; synthetic tugtupite and a beryllosilicate framework with a 3 : 1 Si : Be ratio. Dalton Transactions, (24), 2998-3005. (doi:10.1039/b600579a).

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Original Publication URL: http://dx.doi.org/10.1039/b600579a

Description/Abstract

Compounds of the formula Na-8[Si(6 + y)BeyAl(6 - 2y)O(24)]X-2, with X = Cl and Br, and y = 1, 2 and 3 have been synthesised and structurally characterised by combined powder X-ray and neutron diffraction pro. le analysis. These materials adopt the sodalite framework ( SOD) with the tetrahedral species, BeO4, AlO4 and SiO4, disordered across the framework positions. Na-8[Si8Be2Al2O24]Cl-2, (y = 2), is a synthetic analogue of the naturally occurring semi-precious gemstone tugtupite, while Na-8[Si9Be3O24]X-2, X = Cl and Br represents a new tetrahedral framework stoichiometry with a Si : Be ratio of 3 : 1. Additional characterisation using Si-29 MASNMR, IR spectroscopy and high-temperature, neutron diffraction show that the observed structure - property trends found when modelling sodalite materials can be extended to these new framework compositions.

Item Type: Article
ISSNs: 1477-9226 (print)
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Keywords: solid-state nmr, x = cl, crystal-structure, neutron-diffraction, molecular-sieves, zeolite, gallium, spectra, helvite, angle
Subjects: T Technology > TP Chemical technology
Divisions: University Structure - Pre August 2011 > School of Chemistry
ePrint ID: 44362
Date Deposited: 01 Mar 2007
Last Modified: 27 Mar 2014 18:28
URI: http://eprints.soton.ac.uk/id/eprint/44362

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