6533b82afe1ef96bd128c105
RESEARCH PRODUCT
The essential identity of the framework structures of ZSM-8 and ZSM-5
R. D. ShannonR.x. FischerClaudia WeidenthalerClaudia Weidenthalersubject
Crystallographychemistry.chemical_compoundLattice constantTetraethylammoniumAluminosilicateChemistrylawMoleculeCalcinationCrystal structureZSM-5Powder diffractionlaw.inventiondescription
The crystal structures of TEA-ZSM-8 and its calcined template-free form have been studied by Rietveld analyses based on X-ray powder diffraction data. The results show that the aluminosilicate framework structure of ZSM-8 is essentially identical to that of ZSM-5. The tetraethylammonium molecule could be located in the difference Fourier analysis yielding positions similar to its TPA counterpart in ZSM-5. Lattice constants of ZSM-8 are in the same range as for ZSM-5. Contrary results are related to incorrectly indexed powder patterns. Optical investigations of ZSM-5 and ZSM-8 crystals showed that the zeolites studied here are both twinned exhibiting differently shaped twin individuals.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1994-01-01 |