Tripling of the unit cell volume of the non-centrosymmetric AlPO4-SOD after dehydration: a structural study of a reversible process.
The structure of AlPO4-SOD, a microporous aluminophosphate synthesized in a quasi-nonaqueous system using dimethylformamide as template and solvent, was previously reported. Then, various solid state nuclear magnetic resonance techniques applied on the dehydrated compound at 200 degrees C were performed and suggested a rearrangement of one-third of the template molecules inside the sodalite cages and a tripling of the unit cell parameter c. We present here the structure determined from molecular modeling and Rietveld analysis on synchrotron data of AlPO4-SOD dehydrated under vacuum at 100 degrees C together with some solid state NMR experiments of the rehydrated product.
Paillaud
Jean-Louis
JL
Laboratoire de Matériaux à Porosité Contrôlée, UMR 7016, ENSCMu, Université de Haute Alsace, 3 rue Alfred Werner, 68093 Mulhouse Cedex, France. Jean-Louis.PAILLAUD@uha.fr
Marichal
Claire
C
Roux
Mélanie
M
Baerlocher
Christian
C
Chézeau
Jean Michel
JM