HYDROTHERMAL SYNTHESIS OF MG-RICH AND MG-NI-RICH KAOLINITE
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dc.contributor.author | Bentabol M. | |
dc.contributor.author | Cruz M.D.R. | |
dc.contributor.author | Huertas F.Ja. | |
dc.contributor.author | Linares J. | |
dc.date.accessioned | 2024-09-04T09:55:44Z | |
dc.date.available | 2024-09-04T09:55:44Z | |
dc.date.issued | 2006 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=53087957 | |
dc.identifier.citation | Clays and Clay Minerals, 2006, 54, 6, 667-677 | |
dc.identifier.issn | 0009-8604 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/44955 | |
dc.description.abstract | Mg-rich kaolinite and Mg+Ni-rich kaolinite have been synthesized in hydrothermal experiments (200 and 400°C) from poorly crystalline kaolinite and Mg- and Mg+Ni-bearing solutions. Al-rich serpentine and Al-rich chlorite were obtained as sub-products of the reactions. The formation of these phases occurred through a dissolution-precipitation mechanism that led to spherical kaolinite after short reaction times. A morphological evolution towards platy particles and stacks occurred at increasing run times. Identification of the several phases was carried out using a combination of X-ray diffraction and transmission/analytical electron microscopy. Analytical data indicate that the Mg content in kaolinite increased as a function of the reaction time and temperature, reaching up to 0.46 atoms per half formula unit (a.p.h.f.u.). The measured (Mg+Ni) content reached up to 0.56 a.p.h.f.u.. Both the gradual increase of the b-cell parameter of kaolinite at increasing Mg contents and the presence of new bands on the FTIR spectra of the synthesized kaolinite point to a Mg-for-Al replacement in the octahedral sheet rather than to the presence of serpentine-like layers interstratified in the kaolinite structure. | |
dc.subject | AL-RICH SERPENTINE | |
dc.subject | FTIR | |
dc.subject | HYDROTHERMAL SYNTHESIS | |
dc.subject | MG-RICH KAOLINITE | |
dc.subject | TEM/AEM | |
dc.subject | XRD | |
dc.title | HYDROTHERMAL SYNTHESIS OF MG-RICH AND MG-NI-RICH KAOLINITE | |
dc.type | Статья | |
dc.identifier.doi | 10.1346/ccmn.2006.0540602 |
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