The paper reports the occurrence and the crystal-chem. data of willhendersonite from the breccia ridge of a melilitite plug at Colle Fabbri, Terni, Italy. The chem. data suggests extensive chem. variability, ranging from the compn. of the holotype sample (CaKAl3Si3O12: 5 H2O) through intermediate compns., to a Ca-pure term; thus it becomes necessary for a chem. redefinition of the zeolite. The structural refinement of a Ca-pure willhendersonite single crystal exhibits the same space group and Si/Al ordering as the holotype willhendersonite, but it displays significant differences in the distribution of the extra-framework species. These structural features are discussed in the light of a comparison with the structures of the holotype willhendersonite and natural and exchanged chabazites.

Occurrence and crystal structure of a Ca-pure willhendersonite / Vezzalini, Maria Giovanna; S., Quartieri; Galli, Ermanno. - In: ZEOLITES. - ISSN 0144-2449. - STAMPA. - 19:(1997), pp. 75 |-79.

Occurrence and crystal structure of a Ca-pure willhendersonite

VEZZALINI, Maria Giovanna;GALLI, Ermanno
1997

Abstract

The paper reports the occurrence and the crystal-chem. data of willhendersonite from the breccia ridge of a melilitite plug at Colle Fabbri, Terni, Italy. The chem. data suggests extensive chem. variability, ranging from the compn. of the holotype sample (CaKAl3Si3O12: 5 H2O) through intermediate compns., to a Ca-pure term; thus it becomes necessary for a chem. redefinition of the zeolite. The structural refinement of a Ca-pure willhendersonite single crystal exhibits the same space group and Si/Al ordering as the holotype willhendersonite, but it displays significant differences in the distribution of the extra-framework species. These structural features are discussed in the light of a comparison with the structures of the holotype willhendersonite and natural and exchanged chabazites.
1997
19
75 |
79
Occurrence and crystal structure of a Ca-pure willhendersonite / Vezzalini, Maria Giovanna; S., Quartieri; Galli, Ermanno. - In: ZEOLITES. - ISSN 0144-2449. - STAMPA. - 19:(1997), pp. 75 |-79.
Vezzalini, Maria Giovanna; S., Quartieri; Galli, Ermanno
File in questo prodotto:
File Dimensione Formato  
Willendersonite.pdf

Accesso riservato

Tipologia: Versione dell'autore revisionata e accettata per la pubblicazione
Dimensione 402.57 kB
Formato Adobe PDF
402.57 kB Adobe PDF   Visualizza/Apri   Richiedi una copia
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/736683
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 11
  • ???jsp.display-item.citation.isi??? 14
social impact