Comparative compressional behavior of chabazite with Li+, Na+, Ag+, K+, Rb+, and Cs+ as extra-framework cations

Yongjae Lee, Mihye Kong, Yongmoon Lee, G. Diego Gatta

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The high-pressure behavior of monovalent-cation-exchanged chabazites was investigated by means of in situ synchrotron X-ray powder diffraction with a diamond-anvil cell, and using water as penetrating pressure-transmitting medium, up to 5.5 GPa at room temperature. In all cases, except for Na-containing chabazites, a phase transition from the original rhombohedral (R3m) to triclinic symmetry (likely P1) was observed in the range between 3.0 GPa and 5.0 GPa. The phase transition is accompanied by an abrupt decrease of the unit-cell volume by up to 10%. Evidence of pressure-induced hydration (PIH), i.e., P-induced penetration of H2O molecules through the zeolitic cavities, was observed, as reflected by the incompressibility of the cation-exchanged chabazites, which is governed by the distribution of the extra-framework cations. The reversibility of the PIH and P-induced phase transitions in the high-pressure behavior of the cation-exchanged chabazites are discussed in the context of the role played by the chemical nature and bonding configuration of the extra-framework cations, along with that of the H2O content at room conditions.

Original languageEnglish
Pages (from-to)207-215
Number of pages9
JournalAmerican Mineralogist
Volume103
Issue number2
DOIs
Publication statusPublished - 2018 Feb 23

Fingerprint

chabazite
Cations
cation
cations
phase transition
Phase transitions
hydration
Hydration
Monovalent Cations
incompressibility
diamond anvil cell
Diamond
anvils
cells
Synchrotrons
X ray powder diffraction
rooms
symmetry
synchrotrons
cavity

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

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title = "Comparative compressional behavior of chabazite with Li+, Na+, Ag+, K+, Rb+, and Cs+ as extra-framework cations",
abstract = "The high-pressure behavior of monovalent-cation-exchanged chabazites was investigated by means of in situ synchrotron X-ray powder diffraction with a diamond-anvil cell, and using water as penetrating pressure-transmitting medium, up to 5.5 GPa at room temperature. In all cases, except for Na-containing chabazites, a phase transition from the original rhombohedral (R3m) to triclinic symmetry (likely P1) was observed in the range between 3.0 GPa and 5.0 GPa. The phase transition is accompanied by an abrupt decrease of the unit-cell volume by up to 10{\%}. Evidence of pressure-induced hydration (PIH), i.e., P-induced penetration of H2O molecules through the zeolitic cavities, was observed, as reflected by the incompressibility of the cation-exchanged chabazites, which is governed by the distribution of the extra-framework cations. The reversibility of the PIH and P-induced phase transitions in the high-pressure behavior of the cation-exchanged chabazites are discussed in the context of the role played by the chemical nature and bonding configuration of the extra-framework cations, along with that of the H2O content at room conditions.",
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Comparative compressional behavior of chabazite with Li+, Na+, Ag+, K+, Rb+, and Cs+ as extra-framework cations. / Lee, Yongjae; Kong, Mihye; Lee, Yongmoon; Diego Gatta, G.

In: American Mineralogist, Vol. 103, No. 2, 23.02.2018, p. 207-215.

Research output: Contribution to journalArticle

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