An in Situ Microcrystal X-ray Diffraction Study of the Synthetic Aluminophosphate Zeotypes DAF-1 and CoAPSO-44

An in Situ Microcrystal X-ray Diffraction Study of the Synthetic Aluminophosphate Zeotypes DAF-1 and CoAPSO-44

Microcrystalline diffraction techniques employing synchrotron radiation are used to obtain detailed structural information on two zeotype aluminophosphates. For DAF-1 a much improved description of the framework structure, especially relating to the Al−O, P−O bond alternation, has been obtained. A d...

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Veröffentlicht in:Chemistry of Materials 1999-01, Vol.11 (1), p.158-163
Hauptverfasser: Muncaster, Gavin, Sankar, Gopinathan, Catlow, C. Richard A, Thomas, John Meurig, Bell, Robert G, Wright, Paul A, Coles, Simon, Teat, Simon J, Clegg, William, Reeve, William
Format: Artikel
Sprache:eng
Schlagworte:
ALUMINIUM PHOSPHATES
CALCINATION
Chemistry
COBALT PHOSPHATES
Condensed matter: structure, mechanical and thermal properties
CORRELATIONS
CRYSTAL STRUCTURE
Exact sciences and technology
FOURIER TRANSFORM SPECTROMETERS
General and physical chemistry
Inorganic compounds
Ion-exchange
MAGNESIUM PHOSPHATES
MATERIALS SCIENCE
MOLECULAR SIEVES
Physics
Salts
Structure of solids and liquids
crystallography
Structure of specific crystalline solids
Surface physical chemistry
X-RAY DIFFRACTION
Zeolites: preparations and properties
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Zusammenfassung:Microcrystalline diffraction techniques employing synchrotron radiation are used to obtain detailed structural information on two zeotype aluminophosphates. For DAF-1 a much improved description of the framework structure, especially relating to the Al−O, P−O bond alternation, has been obtained. A detailed in situ study of the structural changes occurring during the calcination of the template in the material CoAPSO-44 is reported. In situ FTIR spectroscopy yields a correlation between the decomposition of the template and the creation of framework Bronsted acid sites.
ISSN:0897-4756
1520-5002
DOI:10.1021/cm980604q