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ChemInform Abstract: A Powder Neutron Diffraction Study of Lithium-Substituted Gallosilicate and Aluminogermanate Halide Sodalites.

✍ Scribed by Geoffrey M. Johnson; Mark T. Weller

Publisher
John Wiley and Sons
Year
2010
Weight
33 KB
Volume
30
Category
Article
ISSN
0931-7597

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✦ Synopsis

2 (I) and Na 8 [AlGeO 4 ] 6 X 2 (II) (X: Cl, Br, I) is achieved in a LiNO 3 melt at 240 β€’ C. The neutron diffraction results show that the framework collapse associated with the Li exchange is accomodated by cooperative rotation about the 4 axis and a decrease in the framework Ga-O-Si (Al-O-Ge) bond angle. Complete replacement of Na by Li is possible for all sodalites (I) and for (II) with X: Br, I. In the case of Na 8 [AlGeO 4 ] 6 Cl 2 , the required level of structure collapse seems to preclude full replacement of sodium by lithium.

-(JOHNSON, GEOFFREY M.;

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