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

New sodalite frameworks; synthetic tugtupite and a beryllosilicate framework with a 3 : 1 Si : Be ratio
New sodalite frameworks; synthetic tugtupite and a beryllosilicate framework with a 3 : 1 Si : Be ratio
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 profile 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.
solid-state nmr, x = cl, crystal-structure, neutron-diffraction, molecular-sieves, zeolite, gallium, spectra, helvite, angle
1477-9226
2998-3005
Armstrong, J.A.
578ab464-61b6-4eac-9b1f-6189341ec191
Weller, M.T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Armstrong, J.A.
578ab464-61b6-4eac-9b1f-6189341ec191
Weller, M.T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4

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).

Record type: Article

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 profile 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.

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More information

Published date: 2006
Keywords: solid-state nmr, x = cl, crystal-structure, neutron-diffraction, molecular-sieves, zeolite, gallium, spectra, helvite, angle

Identifiers

Local EPrints ID: 44362
URI: https://eprints.soton.ac.uk/id/eprint/44362
ISSN: 1477-9226
PURE UUID: 64df695b-30b0-4a6c-9f2a-decc13077a12

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Date deposited: 01 Mar 2007
Last modified: 13 Mar 2019 21:07

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