Structure of natural and NH4-exchanged Sasbach faujasite: a single-crystal study

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Marco E. Ciriotti
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Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Structure of natural and NH4-exchanged Sasbach faujasite: a single-crystal study

Messaggio da Marco E. Ciriotti » lun 26 feb, 2018 11:31

Prossima pubblicazione.

Referenza:
▪ Fantini, R., Arletti, R., Pastero, L., Quartieri, S., Di Renzo, F., Cámara, F., Vezzalini, G. (2018): Structure of natural and NH4-exchanged Sasbach faujasite: a single-crystal study. European Journal of Mineralogy, 30, (in press).
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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TOSATO FABIO
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Re: Structure of natural and NH4-exchanged Sasbach faujasite: a single-crystal study

Messaggio da TOSATO FABIO » lun 26 feb, 2018 19:42

Complimenti agli autori.
Tosato Fabio
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Marco E. Ciriotti
Messaggi: 24492
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Re: Structure of natural and NH4-exchanged Sasbach faujasite: a single-crystal study

Messaggio da Marco E. Ciriotti » ven 11 mag, 2018 17:08

Referenza:
▪ Fantini, R., Arletti, R., Pastero, L., Quartieri, S., Di Renzo, F., Cámara, F., Vezzalini, G. (2018): Structure of natural and NH4-exchanged Sasbach faujasite: a single-crystal study. European Journal of Mineralogy, 30, (in press).

Abstract:
The interest for the environmental, industrial and technological applications of Si-rich zeolites is very high. Among the large-pore zeolites, faujasite is one of the most exploited. The aim of this paper is to obtain detailed structural information on natural and NH4-exchanged faujasite before using this zeolite for dealumination tests, targeting the realization of large single crystals of all-silica faujasite. As one of the most Si-rich natural samples, faujasite from Sasbach (Na13.64K0.87Mg10.46Ca8.89Sr0.34(Al51.95Si139.57)O384·272.29 H2O; space group Fd-3m; a = 24.6906(2)Å) was chosen for study. Single-crystal X-ray diffraction structural refinements of both natural and NH4-exchanged samples are reported and discussed. In the natural faujasite sample, almost all the extraframework species could be located for the first time. In the NH4-exchanged sample the ammonium and water molecule sites were located. Ammonium cations occupy two of the sites occupied by the extraframework species in the original mineral.
Marco E. Ciriotti

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