Инд. авторы:	Likhacheva A.Y., Malyshev M.E., Manakov A.Y., Goryainov S.V., Ancharov A.I.
Заглавие:	Non-hydrostatic compression of zeolite NaA in water medium: Connection to anomalous conductivity
Библ. ссылка:	Likhacheva A.Y., Malyshev M.E., Manakov A.Y., Goryainov S.V., Ancharov A.I. Non-hydrostatic compression of zeolite NaA in water medium: Connection to anomalous conductivity // Zeitschfrift fur Kristallographie. - 2009. - Vol.224. - Iss. 3. - P.137-143. - ISSN 0044-2968.
Внешние системы:	DOI: 10.1524/zkri.2009.1128; SCOPUS: 2-s2.0-63849137237;
Реферат:	eng: High-pressure synchrotron X-ray powder diffraction measurements of a synthetic zeolite NaA were carried out up to 2.5 GPa using pure water as pressure-transmitting (P) medium to provide non-hydrostatic (wet) conditions in a diamond anvil cell. The compressibility of wet zeolite NaA is similar to that measured at hydrostatic compression in water within the P-range 0-0.8 GPa, whereas between 1-2 GPa the zeolite becomes slightly more compressible and progressively amorphizes due to the non-hydrostatic conditions. Rietveld refinement at 0.37 GPa reveals a selective additional filling of the H 2O sites in α- and β-cage, leading to about 30% increase of the total water content. The over-hydrated state of the zeolite is partially preserved after the pressure release. The over-hydration of zeolite pores, combined with a partial disordering at the onset of amorphization, apparently provides necessary conditions for the P-induced enhancement of water-cationic diffusion and the corresponding increase of ionic conductivity observed in zeolite NaA in non-hydrostatic water medium. © by Oldenbourg Wissenschaftsverlag.
Ключевые слова:	High pressure; Over-hydration; Compressibility; Zeolite NaA; X-ray diffraction; Powder diffraction structure analysis;
Издано:	2009
Физ. характеристика:	с.137-143