THE STRUCTURES OF STRONTIUM TELLURITE AND STRONTIUM TELLURIDE ALUMINATE SODALITES STUDIED BY POWDER NEUTRON-DIFFRACTION, EXAFS, IR AND MAS NMR SPECTROSCOPIES

Authors
DANN SE WELLER MT
Citation
Se. Dann et Mt. Weller, THE STRUCTURES OF STRONTIUM TELLURITE AND STRONTIUM TELLURIDE ALUMINATE SODALITES STUDIED BY POWDER NEUTRON-DIFFRACTION, EXAFS, IR AND MAS NMR SPECTROSCOPIES, Journal of materials chemistry, 6(10), 1996, pp. 1717-1721
Citations number
30
Categorie Soggetti
Chemistry Physical","Material Science
Journal title
Journal of materials chemistry → ACNP
ISSN journal
09599428
Volume
6
Issue
10
Year of publication
1996
Pages
1717 - 1721
Database
ISI
SICI code
0959-9428(1996)6:10<1717:TSOSTA>2.0.ZU;2-3
Abstract
Aluminate sodalites containing the telluride and tellurite ions have b een synthesised for the first time. The structures of Sr-8[AlO2](12)(T eO3)(2) and its reduced product Sr-8[AlO2]Te-12(2) have been determine d using Rietveld refinement of powder neutron diffraction data. In Sr- 8[AlO2]Te-12(2) the anion occupies a position at the sodalite cage cen tre, whilst in Sr-8[AlO2](12)(TeO3)(2) the larger tellurite ion is dis placed to allow reasonable coordination to the strontium ions. The red uction of the occluded TeO32- to Te2- has also been investigated using IR spectroscopy, Al-27 and Te-125 MAS NMR spectroscopies and Te L(III )-edge EXAFS.