Brillouin scattering study on the single-crystal elastic properties of natrolite and analcime zeolites

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Brillouin scattering study on the single-crystal elastic properties of natrolite and analcime zeolites

Please use this identifier to cite or link to this item: http://hdl.handle.net/10036/19036

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Title: Brillouin scattering study on the single-crystal elastic properties of natrolite and analcime zeolites
Author: Sanchez-Valle, Carmen
Sinogeikin, Stanislav V.
Lethbridge, Zoe A. D.
Walton, Richard I.
Smith, Christopher W.
Evans, Kenneth E.
Bass, Jay D
Citation: 98 (5), pp. 053508
Publisher: American Institute of Physics
Journal: Journal of Applied Physics
Date Issued: 2005
URI: http://hdl.handle.net/10036/19036
DOI: 10.1063/1.2014932
Links: http://link.aip.org/link/?jap/98/053508
Abstract: The Brillouin light-scattering technique was used to investigate the single-crystal elastic properties of two aluminosilicate zeolites, natrolite (NAT) and analcime (ANA), at ambient conditions. An inversion of the acoustic velocity data results in the full set of elastic stiffness moduli (Cij's) for both materials. From the single-crystal moduli the aggregate adiabatic bulk moduli (Ks), shear moduli (G), and Poisson's ratios (v) were found to be Ks=48.5(1.0) GPa, G=31.6(1.0) GPa, and v =0.232(5) for NAT, and Ks=59.8(1.2) GPa, G=32.1(1.0) GPa, and v=0.272(5) for ANA (Voigt-Reuss-Hill averages). The bulk and shear moduli of both zeolites are relatively low compared with those of densely packed aluminosilicates, reflecting an open framework structure of (Al,SiO4) tetrahedra which is easily deformed by bending the Si–O–Al angles. As expected for a less dense crystal, NAT is softer and more compressible than ANA. An evaluation of the directional Young's moduli shows that the compressibility of NAT is nearly uniform along the [100] and [010] axes, while [001] is stiffer, in agreement with previous compression studies. We do not find experimental evidence of negative Poisson's ratios for NAT zeolites as predicted by recent theoretical calculations.
Type: Article
Description: Copyright © 2005 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics 98 (2005) and may be found at http://link.aip.org/link/?jap/98/053508
Keywords: mechanical propertiesauxetic materialshigh pressurediffractionexpansionMFIzeolites
ISSN: 0021-8979


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