Rigid unit modes (RUMs) of distortion, local crystal chemistry and the inherent displacive flexibility of microporous AlPO4-11
Electron diffraction is used to investigate the average structure of microporous AlPO4-11 as well as the zero-frequency rigid unit mode (RUM) modes of distortion of the ideal AlPO4-11 tetrahedral framework. Direct experimental evidence (in the form of a highly structured, characteristic diffuse intensity distribution) has been found for the (presumably dynamic) excitation of numerous zero-frequency RUM modes of distortion. The lattice dynamic program CRUSH is used to confirm the existence of...[Show more]
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|Source:||Journal of Solid State Chemistry|
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