Phase Transitions of Silicasodalite under High Pressure-Single Crystal Studies with Synchrotron Radiation

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

  • O. Oeckler
  • S. Werner
  • H. Schulz
  • Peter Behrens

Externe Organisationen

  • Ludwig-Maximilians-Universität München (LMU)
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)139-141
Seitenumfang3
FachzeitschriftReview of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Jahrgang7
PublikationsstatusVeröffentlicht - 1998
Extern publiziertJa

Abstract

The compressibilities of ethylenglycol and ethanolamin silica sodalite (EGS-SOD and EAS-SOD) have been measured up to 3.1 and 3.2 GPa, respectively. Both compounds show extraordinarily high compressibilities, from a fit to a Birch Murnaghan equation of state the bulk moduli and pressure derivatives calculate to K = 8.3(5) GPa, K’ = 8(1) and K = 9.7(7) GPa, K’ = 3.8(7). EGS-SOD shows three phase transitions to a monoclinic and two triclinic high pressure phases in the pressure range investigated. These phase transitions are completely reversible and no twinning has been observed while passing the transition pressures. The structures of the monoclinic and of the 1st triclinic high pressure phase have been solved on the basis of intensity data collected with synchrotron radiation. Whereas the ethylenglycol guest molecules are dynamically disordered under room conditions, they adopt an ordered arrangement in the 2nd high pressure phase. Structure refinements of EAS-SOD again reveal a triclinic high pressure phase at 1.1 GPa.

ASJC Scopus Sachgebiete

Zitieren

Phase Transitions of Silicasodalite under High Pressure-Single Crystal Studies with Synchrotron Radiation. / Oeckler, O.; Werner, S.; Schulz, H. et al.
in: Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu, Jahrgang 7, 1998, S. 139-141.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Oeckler, O, Werner, S, Schulz, H & Behrens, P 1998, 'Phase Transitions of Silicasodalite under High Pressure-Single Crystal Studies with Synchrotron Radiation', Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu, Jg. 7, S. 139-141. https://doi.org/10.4131/jshpreview.7.139
Oeckler, O., Werner, S., Schulz, H., & Behrens, P. (1998). Phase Transitions of Silicasodalite under High Pressure-Single Crystal Studies with Synchrotron Radiation. Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu, 7, 139-141. https://doi.org/10.4131/jshpreview.7.139
Oeckler O, Werner S, Schulz H, Behrens P. Phase Transitions of Silicasodalite under High Pressure-Single Crystal Studies with Synchrotron Radiation. Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu. 1998;7:139-141. doi: 10.4131/jshpreview.7.139
Oeckler, O. ; Werner, S. ; Schulz, H. et al. / Phase Transitions of Silicasodalite under High Pressure-Single Crystal Studies with Synchrotron Radiation. in: Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu. 1998 ; Jahrgang 7. S. 139-141.
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AU - Oeckler, O.

AU - Werner, S.

AU - Schulz, H.

AU - Behrens, Peter

PY - 1998

Y1 - 1998

N2 - The compressibilities of ethylenglycol and ethanolamin silica sodalite (EGS-SOD and EAS-SOD) have been measured up to 3.1 and 3.2 GPa, respectively. Both compounds show extraordinarily high compressibilities, from a fit to a Birch Murnaghan equation of state the bulk moduli and pressure derivatives calculate to K = 8.3(5) GPa, K’ = 8(1) and K = 9.7(7) GPa, K’ = 3.8(7). EGS-SOD shows three phase transitions to a monoclinic and two triclinic high pressure phases in the pressure range investigated. These phase transitions are completely reversible and no twinning has been observed while passing the transition pressures. The structures of the monoclinic and of the 1st triclinic high pressure phase have been solved on the basis of intensity data collected with synchrotron radiation. Whereas the ethylenglycol guest molecules are dynamically disordered under room conditions, they adopt an ordered arrangement in the 2nd high pressure phase. Structure refinements of EAS-SOD again reveal a triclinic high pressure phase at 1.1 GPa.

AB - The compressibilities of ethylenglycol and ethanolamin silica sodalite (EGS-SOD and EAS-SOD) have been measured up to 3.1 and 3.2 GPa, respectively. Both compounds show extraordinarily high compressibilities, from a fit to a Birch Murnaghan equation of state the bulk moduli and pressure derivatives calculate to K = 8.3(5) GPa, K’ = 8(1) and K = 9.7(7) GPa, K’ = 3.8(7). EGS-SOD shows three phase transitions to a monoclinic and two triclinic high pressure phases in the pressure range investigated. These phase transitions are completely reversible and no twinning has been observed while passing the transition pressures. The structures of the monoclinic and of the 1st triclinic high pressure phase have been solved on the basis of intensity data collected with synchrotron radiation. Whereas the ethylenglycol guest molecules are dynamically disordered under room conditions, they adopt an ordered arrangement in the 2nd high pressure phase. Structure refinements of EAS-SOD again reveal a triclinic high pressure phase at 1.1 GPa.

KW - High pressure

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KW - Zeolites

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