Anisotropic compression of a synthetic potassium aluminogermanate zeolite with gismondine topology

Young Nam Jang, Chi Chang Kao, Thomas Vogt, Yongjae Lee

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Compression behaviour of a potassium aluminogermanate with a gismondine framework topology (K-AlGe-GIS) was studied using in-situ high-pressure synchrotron X-ray powder diffraction. In contrast to the potassium gallosilicate analogue (K-GaSi-GIS), no elastic anomaly due to pressure-induced hydration and/or cation relocation was observed in K-AlGe-GIS. The BirchMurnaghan fit to the pressurevolume data results in a bulk modulus of B0=31(1) GPa. The derived linear-axial compressibilities (i.e., βa=0.0065(5) GPa-1, βb=0.0196(4) GPa-1, βc=0.0081(7) GPa-1) indicate that the b-axis, normal to the 8-ring channels, is about three times more compressible than the a and c axes, parallel to the elliptical 8-ring channels. As a consequence a gradual flattening of the so-called 'double crankshaft' structural building units of the gismondine framework is observed. In K-AlGe-GIS, this flattening occurs almost linear with pressure, whereas it is nonlinear in the GaSi-analogue due to structural changes of the watercation assembly under hydrostatic pressures.

Original languageEnglish
Pages (from-to)2305-2308
Number of pages4
JournalJournal of Solid State Chemistry
Volume183
Issue number10
DOIs
Publication statusPublished - 2010 Oct 1

Fingerprint

Zeolites
flattening
Geographic information systems
Potassium
potassium
topology
Topology
analogs
relocation
rings
bulk modulus
hydrostatic pressure
compressibility
hydration
synchrotrons
assembly
anomalies
cations
Crankshafts
Relocation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Cite this

Jang, Young Nam ; Kao, Chi Chang ; Vogt, Thomas ; Lee, Yongjae. / Anisotropic compression of a synthetic potassium aluminogermanate zeolite with gismondine topology. In: Journal of Solid State Chemistry. 2010 ; Vol. 183, No. 10. pp. 2305-2308.
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Anisotropic compression of a synthetic potassium aluminogermanate zeolite with gismondine topology. / Jang, Young Nam; Kao, Chi Chang; Vogt, Thomas; Lee, Yongjae.

In: Journal of Solid State Chemistry, Vol. 183, No. 10, 01.10.2010, p. 2305-2308.

Research output: Contribution to journalArticle

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