PHASE CHANGES AND AMORPHIZATION OF ZEOLITES AT HIGH PRESSURES: THE CASE OF SCOLECITE AND MESOLITE
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dc.contributor.author | Gillet P. | |
dc.contributor.author | Malézieux J.M. | |
dc.contributor.author | Itié J.P. | |
dc.date.accessioned | 2020-12-05T10:59:40Z | |
dc.date.available | 2020-12-05T10:59:40Z | |
dc.date.issued | 1996 | |
dc.identifier | https://elibrary.ru/item.asp?id=31736173 | |
dc.identifier.citation | American Mineralogist, 1996, , 5, 651-657 | |
dc.identifier.issn | 0003-004X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/20488 | |
dc.description.abstract | Pressure-induced amorphous-phase transitions (amorphization) have been observed in framework silicates like quartz and feldspars. A similar crystalline to highly disordered solid phase transition is reported in this study for two zeolites, scolecite and mesolite. Pressure-induced amorphization is demonstrated using in situ X-ray diffraction and Ra- man spectroscopy. Before complete amorphization, progressive structural changes are ob- served below 10 GPa. The transition from the crystal to the amorphous phase is irrevers- ible, and the pressure-quenched samples exhibit Raman spectra that bear strong resemblance to alumino silicate glasses obtained by quenching a liquid. In some cases, however, decom- pression from 15 GPa of fully amorphized samples is accompanied by a rim recrystalli- zation of the sample and preservation of an amorphous phase with a structure different from that quenched in other experiments. Shear stresses seem to have important control of the transformation occurring during the decompression of the samples. | |
dc.title | PHASE CHANGES AND AMORPHIZATION OF ZEOLITES AT HIGH PRESSURES: THE CASE OF SCOLECITE AND MESOLITE | |
dc.type | Статья |
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