Mössbauer study of hydrothermal transformation of natural clinoptilolite into Y and P1 zeolites
| Autor: | Rolando Roque-Malherbe, Carlos de las Pozas del Rio, Carlos Diaz-Aguila, Edilso Reguera-Ruiz |
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| Rok vydání: | 1991 |
| Předmět: |
Clinoptilolite
Chemistry Quadrupole splitting Condensed Matter Physics Hydrothermal circulation Electronic Optical and Magnetic Materials law.invention Inorganic Chemistry Nuclear magnetic resonance Octahedron law Mössbauer spectroscopy Materials Chemistry Ceramics and Composites Physical chemistry Physical and Theoretical Chemistry Crystallization Zeolite Spin (physics) |
| Zdroj: | Journal of Solid State Chemistry. 94:215-219 |
| ISSN: | 0022-4596 |
| DOI: | 10.1016/0022-4596(91)90185-k |
| Popis: | The hydrothermal transformation of Na-clinoptilolite to NaY and NaP 1 zeolites has been studied by Mossbauer spectroscopy of well-characterized solid intermediate phases (XRD, IR, 29 Si MAS NMR, and thermodielectric analysis). The evolution of the quadrupole splitting of high spin Fe 3+ during the amorphization and crystallization processes which characterize the hydrothermal transformations indicates that octahedral sites are structure sensitive, while the tetrahedral ones fundamentally depend on the Si Al ratio. Isomer shift values depend on Si Al ratio in both cases. |
| Databáze: | OpenAIRE |
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