Padua Research Archive, l’archivio istituzionale della produzione scientifica dell’Università degli Studi di Padova, ha lo scopo di raccogliere, documentare, conservare e pubblicare, anche ad accesso aperto, i prodotti della ricerca dell’Ateneo. Padua Research Archive utilizza la piattaforma IRIS (Institutional Research Information System) sviluppata da Cineca.
EnglishThe crystal structure of perlialite from the Murun Massif, U.S.S.R. was determined and refined using synchrotron X-ray powder data. The framework type of this natural zeolite is the same as synthetic zeolite Linde-L. Extraframework cation and water oxygen position were located, and the locations and occupancies show large differences with respect to the cation and water sites previously reported for the synthetic zeolites K-L and Ba, K-L. Refinement results and subsequent chemical analysis on the Murun sample lead us to revise the unit cell formula of perlialite to: K8Tl4Al12Si24O72 . 20H2O. The chemical formula has a Tl content not shown in the original chemical analyses of the species. Space group P 6/m mm was confirmed and the refined cell parameters are a = 18.5432(4), c = 7.5310(3) angstrom. A Rietveld refinement of the same sample using conventional automated powder diffractometer data confirmed the structural model and crystallochemical details.
| Titolo: | Synchrotron x-ray Rietveld study of perlialite, the natural counterpart of synthetic zeolite-L | |
| Autori: | ||
| Data di pubblicazione: | 1990 | |
| Rivista: | ||
| Abstract: | The crystal structure of perlialite from the Murun Massif, U.S.S.R. was determined and refined using synchrotron X-ray powder data. The framework type of this natural zeolite is the same as synthetic zeolite Linde-L. Extraframework cation and water oxygen position were located, and the locations and occupancies show large differences with respect to the cation and water sites previously reported for the synthetic zeolites K-L and Ba, K-L. Refinement results and subsequent chemical analysis on the Murun sample lead us to revise the unit cell formula of perlialite to: K8Tl4Al12Si24O72 . 20H2O. The chemical formula has a Tl content not shown in the original chemical analyses of the species. Space group P 6/m mm was confirmed and the refined cell parameters are a = 18.5432(4), c = 7.5310(3) angstrom. A Rietveld refinement of the same sample using conventional automated powder diffractometer data confirmed the structural model and crystallochemical details. | |
| Handle: | http://hdl.handle.net/11577/2496486 | |
| Appare nelle tipologie: | 01.01 - Articolo in rivista |
File in questo prodotto:
Pubblicazioni consigliate
http://hdl.handle.net/11577/2496486
Copyright © 2022