The high-pressure behavior of a natural erionite-K has been investigated by in situ single-crystal synchrotron X- ray diffraction with a diamond anvil cell (DAC), using four different P-transmitting fluids: the non-penetrating silicone oil and the potentially penetrating methanol:ethanol:H2O = 16:3:1 mixture, pure H2O and naturally hydrated glycerol. The investigated crystals showed typical offretite stacking faults in the diffraction pattern. The experiment in silicone oil showed that the erionite bulk compressibility lies within the range observed for the previously investigated zeolites, as its refined bulk modulus (KV0 = 1/βV0), calculated within the range Pamb-1.52 (5) GPa, resulted equal to 47(2) GPa. The high-pressure experiments performed using potentially penetrating P- transmitting fluids showed significantly lower compressibilities, unambiguously suggesting the P-mediated intrusion of new molecules into the structural voids. Further evidence is provided by the comparative analysis of the framework deformation mechanisms: erionite-K compressed in m.e.w. showed a drastically lower compressibility of the erionite cage, with respect to silicone oil. In conclusion, this study suggests natural erionite, a relatively common zeolite, as a suitable candidate for the P-mediated intrusion and hyper-confinement of molecules into the framework microcavities

High-pressure behavior and crystal-fluid interaction in natural erionite-K / T. Battiston, D. Comboni, F. Pagliaro, P. Lotti, M. Hanfland, G. Diego Gatta. - In: MATERIALS CHEMISTRY AND PHYSICS. - ISSN 0254-0584. - 292:(2022 Dec 01), pp. 126760.1-126760.10. [10.1016/j.matchemphys.2022.126760]

High-pressure behavior and crystal-fluid interaction in natural erionite-K

T. Battiston
Primo
Writing – Original Draft Preparation
;
F. Pagliaro
Membro del Collaboration Group
;
P. Lotti
Writing – Review & Editing
;
G. Diego Gatta
Ultimo
Writing – Review & Editing
2022

Abstract

The high-pressure behavior of a natural erionite-K has been investigated by in situ single-crystal synchrotron X- ray diffraction with a diamond anvil cell (DAC), using four different P-transmitting fluids: the non-penetrating silicone oil and the potentially penetrating methanol:ethanol:H2O = 16:3:1 mixture, pure H2O and naturally hydrated glycerol. The investigated crystals showed typical offretite stacking faults in the diffraction pattern. The experiment in silicone oil showed that the erionite bulk compressibility lies within the range observed for the previously investigated zeolites, as its refined bulk modulus (KV0 = 1/βV0), calculated within the range Pamb-1.52 (5) GPa, resulted equal to 47(2) GPa. The high-pressure experiments performed using potentially penetrating P- transmitting fluids showed significantly lower compressibilities, unambiguously suggesting the P-mediated intrusion of new molecules into the structural voids. Further evidence is provided by the comparative analysis of the framework deformation mechanisms: erionite-K compressed in m.e.w. showed a drastically lower compressibility of the erionite cage, with respect to silicone oil. In conclusion, this study suggests natural erionite, a relatively common zeolite, as a suitable candidate for the P-mediated intrusion and hyper-confinement of molecules into the framework microcavities
Erionite; Single-crystal synchrotron X-ray diffraction; High pressure; Compressibility; Crystal-fluid interaction
Settore GEO/09 - Georisorse Miner.Appl.Mineral.-Petrogr.per l'amb.e i Beni Cul
PRIN201719GGATT_01 - Mineral Reactivity in Large-scale Processes (MiReLaP) - GATTA, GIACOMO DIEGO - PRIN2017 - PRIN bando 2017 - 2019
PSRL220SPOLI_01 - Piano di Sostegno alla Ricerca 2015-2017 - Linea 2 "Dotazione annuale per attività istituzionali" (anno 2020) - POLI, STEFANO - PSR_LINEA2_ / Piano di sviluppo di ricerca - Dotazioni dipartimentali - Linea 2 - 2020
16-set-2022
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/938989
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