Details
| Original language | English |
|---|---|
| Pages (from-to) | 139-141 |
| Number of pages | 3 |
| Journal | Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu |
| Volume | 7 |
| Publication status | Published - 1998 |
| Externally published | Yes |
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.
Keywords
- High pressure, Phase transition, Silicasodalite, Single crystal, Zeolites
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu, Vol. 7, 1998, p. 139-141.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Phase Transitions of Silicasodalite under High Pressure-Single Crystal Studies with Synchrotron Radiation
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
KW - Phase transition
KW - Silicasodalite
KW - Single crystal
KW - Zeolites
UR - http://www.scopus.com/inward/record.url?scp=85024738464&partnerID=8YFLogxK
U2 - 10.4131/jshpreview.7.139
DO - 10.4131/jshpreview.7.139
M3 - Article
AN - SCOPUS:85024738464
VL - 7
SP - 139
EP - 141
JO - Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
JF - Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
SN - 0917-639X
ER -