High-pressure spectroscopic study of hydrous and anhydrous Cs-exchanged natrolites

Dan Liu, Donghoon Seoung, Yongmoon Lee, Zhenxian Liu, Jong Won Lee, Ji Ho Yoon, Yongjae Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Structural phase transitions in hydrous Cs-exchanged natrolite (Cs-NAT-hyd) and anhydrous Cs-exchanged natrolite (Cs-NAT-anh) have been investigated as a function of pressure and temperature using micro-Raman scattering and synchrotron infrared (IR) spectroscopy with pure water as the penetrating pressure medium. The spectroscopic results indicate that Cs-NAT-hyd undergoes a reversible phase transition around 4.72 GPa accompanied by the discontinuous frequency shifts of the breathing vibrational modes of the four-ring and helical eight-ring units of the natrolite framework. On the other hand, we observe that Cs-NAT-anh becomes rehydrated at 0.76 GPa after heating to 100 °C and then transforms into two distinctive phases at 2.24 and 3.41 GPa after temperature treatments at 165 and 180 °C, respectively. Both of these high-pressure phases are characterized by the absence of the helical eight-ring breathing modes, which suggests the collapse of the natrolite channel and formation of dense high-pressure polymorphs. Together with the fact that these high-pressure phases are recoverable to ambient conditions, our results imply a novel means for radionuclide storage utilizing pressure and a porous material.

Original languageEnglish
Pages (from-to)2159-2164
Number of pages6
JournalJournal of Physical Chemistry C
Volume116
Issue number3
DOIs
Publication statusPublished - 2012 Jan 26

Fingerprint

breathing
rings
porous materials
radioactive isotopes
frequency shift
vibration mode
synchrotrons
Phase transitions
infrared spectroscopy
Raman spectra
heating
temperature
Polymorphism
Synchrotrons
Radioisotopes
water
Porous materials
Raman scattering
Infrared spectroscopy
natrolite

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Liu, Dan ; Seoung, Donghoon ; Lee, Yongmoon ; Liu, Zhenxian ; Lee, Jong Won ; Yoon, Ji Ho ; Lee, Yongjae. / High-pressure spectroscopic study of hydrous and anhydrous Cs-exchanged natrolites. In: Journal of Physical Chemistry C. 2012 ; Vol. 116, No. 3. pp. 2159-2164.
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High-pressure spectroscopic study of hydrous and anhydrous Cs-exchanged natrolites. / Liu, Dan; Seoung, Donghoon; Lee, Yongmoon; Liu, Zhenxian; Lee, Jong Won; Yoon, Ji Ho; Lee, Yongjae.

In: Journal of Physical Chemistry C, Vol. 116, No. 3, 26.01.2012, p. 2159-2164.

Research output: Contribution to journalArticle

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AU - Lee, Yongmoon

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AU - Yoon, Ji Ho

AU - Lee, Yongjae

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