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Synchrotron X-ray Powder Diffraction and Computational investigation of Purely Siliceous Zeolite Y under Pressure.
- Source :
-
Journal of the American Chemical Society . 9/29/2004, Vol. 126 Issue 38, p12015-12022. 8p. - Publication Year :
- 2004
-
Abstract
- High-pressure synchrotron X-ray powder diffraction measurements of a sample of purely siliceous zeolite V (faujasite) were carried out up to 8.0 GPa at room temperature using a diamond anvil cell. Measurements using silicone oil as the pressure-transmitting medium show compression of the zeolite followed by a loss of long-range ordering at 2.2 GPa. The experimentally determined bulk modulus, 38(2) GPa, is, within experimental error, identical to that of quartz. When using a methanol:ethanol:water mixture (16:3:1) as the pressure-transmitting medium, two distinct compressibility regions are observed with a dramatic change in the compression mechanism at 4 GPa. Rietveld refinement analysis of the powder patterns provides a detailed description ot the underlying chemistry, with sequential pore filling the main response up to 4 GPa and framework distortions at higher pressures. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027863
- Volume :
- 126
- Issue :
- 38
- Database :
- Academic Search Index
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Academic Journal
- Accession number :
- 14652906
- Full Text :
- https://doi.org/10.1021/ja048685g