Next Article in Journal
Investigation on Calcination Behaviors of Coal Gangue by Fluidized Calcination in Comparison with Static Calcination
Next Article in Special Issue
Effect of Silica Alumina Ratio and Thermal Treatment of Beta Zeolites on the Adsorption of Toluene from Aqueous Solutions
Previous Article in Journal
Minor and Trace Elements in Natural Tetrahedrite-Tennantite: Effects on Element Partitioning among Base Metal Sulphides
Previous Article in Special Issue
Thermal Transformation of NH4-Clinoptilolite to Mullite and Silica Polymorphs
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Minerals 2017, 7(2), 18; https://doi.org/10.3390/min7020018

The Influence of the Framework and Extraframework Content on the High Pressure Behavior of the GIS Type Zeolites: The Case of Amicite

1
Dipartimento di Scienze della Terra, Università di Torino, Via Valperga Caluso 35, 10125 Torino, Italy
2
CrisDI Interdipartemental Center, University of Torino, Via Giuria 7, 10125 Torino, Italy
3
ESRF-European Synchrotron Radiation Facility, CS 40220-38043 Grenoble Cedex 9, Grenoble, France
4
Dipartimento di Scienze Matematiche e Informatiche, Scienze Fisiche e Scienze della Terra, Università di Messina, Viale Ferdinando Stagno d’Alcontres 31, 98166 Messina S. Agata, Italy
5
Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, Via G. Campi 103, 41125 Modena, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Annalisa Martucci
Received: 30 November 2016 / Revised: 25 January 2017 / Accepted: 29 January 2017 / Published: 5 February 2017
View Full-Text   |   Download PDF [3209 KB, uploaded 5 February 2017]   |  

Abstract

This paper reports a study, performed by in-situ synchrotron X-ray Powder Diffraction, of the high pressure behavior of the natural zeolite amicite [K4Na4(Al8Si8O32)·10H2O], the GIS-type phase with ordered (Si, Al) and (Na, K) distribution. The experiments were carried out up to 8.13(5) GPa in methanol:ethanol:water = 16:3:1 (m.e.w.) and 8.68(5) GPa in silicone oil (s.o.). The crystal structure refinements of the patterns collected in m.e.w. were performed up to 4.71(5) GPa, while for the patterns collected in s.o. only the unit cell parameters were determined as a function of pressure. The observed framework deformation mechanism—similar to that reported for the other studied phases with GIS topology—is essentially driven by the distortion of the “double crankshaft” chains and the consequent changed shape of the 8-ring channels. The pressure-induced over-hydration observed in the experiment performed in aqueous medium occurs without unit cell volume expansion, and is substantially reversible. A comparison is made with the high pressure behavior of the other GIS-type phases, and the strong influence on compressibility of the chemical composition of both framework and extraframework species is discussed. View Full-Text
Keywords: zeolite; amicite; high pressure; compressibility; in-situ synchrotron XRPD; pressure-induced hydration (PIH); structure refinement zeolite; amicite; high pressure; compressibility; in-situ synchrotron XRPD; pressure-induced hydration (PIH); structure refinement
Figures

Graphical abstract

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Arletti, R.; Giacobbe, C.; Quartieri, S.; Vezzalini, G. The Influence of the Framework and Extraframework Content on the High Pressure Behavior of the GIS Type Zeolites: The Case of Amicite. Minerals 2017, 7, 18.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top