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dc.contributor.authorSanchez-Valle, Carmenen_GB
dc.contributor.authorSinogeikin, Stanislav V.en_GB
dc.contributor.authorLethbridge, Zoe A. D.en_GB
dc.contributor.authorWalton, Richard I.en_GB
dc.contributor.authorSmith, Christopher W.en_GB
dc.contributor.authorEvans, Kenneth E.en_GB
dc.contributor.authorBass, Jay D.en_GB
dc.contributor.departmentUniversity of Exeter; University of Illinois at Urbana-Champaignen_GB
dc.date.accessioned2008-02-22T11:22:04Zen_GB
dc.date.accessioned2011-01-25T10:32:26Zen_GB
dc.date.accessioned2013-03-20T12:17:27Z
dc.date.issued2005en_GB
dc.description.abstractThe 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.en_GB
dc.identifier.citation98 (5), pp. 053508en_GB
dc.identifier.doi10.1063/1.2014932en_GB
dc.identifier.urihttp://hdl.handle.net/10036/19036en_GB
dc.language.isoenen_GB
dc.publisherAmerican Institute of Physicsen_GB
dc.relation.urlhttp://link.aip.org/link/?jap/98/053508en_GB
dc.subjectmechanical propertiesen_GB
dc.subjectauxetic materialsen_GB
dc.subjecthigh pressureen_GB
dc.subjectdiffractionen_GB
dc.subjectexpansionen_GB
dc.subjectMFIen_GB
dc.subjectzeolitesen_GB
dc.titleBrillouin scattering study on the single-crystal elastic properties of natrolite and analcime zeolitesen_GB
dc.typeArticleen_GB
dc.date.available2008-02-22T11:22:04Zen_GB
dc.date.available2011-01-25T10:32:26Zen_GB
dc.date.available2013-03-20T12:17:27Z
dc.identifier.issn0021-8979en_GB
dc.descriptionCopyright © 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/98/053508en_GB
dc.identifier.journalJournal of Applied Physicsen_GB


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