Clay Minerals
SCIE-ISI SCOPUS (1979-2023)
0009-8558
1471-8030
Anh Quốc
Cơ quản chủ quản: CAMBRIDGE UNIV PRESS , Mineralogical Society
Lĩnh vực:
Geochemistry and Petrology
Các bài báo tiêu biểu
The Oxides and Hydroxides of Iron and Their Structural Inter-Relationships
Tập 4 Số 21 - Trang 15-30 - 1959
The origin and formation of clay minerals in soils: past, present and future perspectivesAbstract The origin and formation of soil clay minerals, namely micas, vermiculites, smectites, chlorites and interlayered minerals, interstratified minerals and kaolin minerals, are broadly reviewed in the context of research over the past half century. In particular, the pioneer overviews of Millot, Pedro and Duchaufour in France and of Jackson in the USA, are con... ... hiện toàn bộ
Tập 34 Số 1 - Trang 7-25 - 1999
Iron oxide catalysts: Fenton and Fentonlike reactions – a reviewAbstract Iron is the fourth most common element by mass in the Earth's crust and forms compounds in several oxidation states. Iron (hydr)oxides, some of which form inherently and exclusively in the nanometre-size range, are ubiquitous in nature and readily synthesized. These facts add up to render many Fe (hydr)oxides suitable as catalysts, and it is hardly surprisi... ... hiện toàn bộ
Tập 47 Số 3 - Trang 285-302 - 2012
Accurate quantitative analysis of clay and other minerals in sandstones by XRD: comparison of a Rietveld and a reference intensity ratio (RIR) method and the importance of sample preparationAbstract X-ray diffraction is used widely for quantitative analysis of geological samples but studies which document the accuracy of the methods employed are not numerous. Synthetic sandstones of known composition are used to compare a ‘routine application’ of a Rietveld and a reference intensity ratio (RIR) method of quantitative phase analysis. Both methods give s... ... hiện toàn bộ
Tập 35 Số 1 - Trang 291-302 - 2000
Structural Model for FerrihydriteAbstract The structure of 6-line and 2-line ferrihydrite (Fh) has been reconsidered. X-ray diffraction (XRD) curves were first simulated for the different structural models so far proposed, and it is shown that neither of these corresponds to the actual structure of ferrihydrite. On the basis of agreement between experimental and simulated XRD curves it is shown tha... ... hiện toàn bộ
Tập 28 Số 2 - Trang 185-207 - 1993
Clay mineralogical investigations related to nuclear waste disposalAbstract Mineralogical and geotechnical investigations on the possible use of compacted bentonite as a buffer material in nuclear waste repositories are reported. The swelling capacity is highly dependent on the density of the compacted bentonite. Swelling pressures >30 MPa were measured for dry densities of ~2.0 g/cm3 . Added iron or magnetit... ... hiện toàn bộ
Tập 33 Số 1 - Trang 109-129 - 1998
Local Structure of Ferrihydrite and Feroxyhite by Exafs SpectroscopyAbstract Synthetic 2-line and 6-line ferrihydrite and feroxyhite samples prepared from ferric salt solutions have been investigated by EXAFS spectroscopy. All these materials have been found to be short-range ordered, consisting of Fe octahedra linked by comers, edges, and faces. Their local structures are related to those of well-crystallized (oxyhydr)oxides, and t... ... hiện toàn bộ
Tập 28 Số 2 - Trang 165-184 - 1993
Chemically modified smectitesAbstract This paper summarizes recent results obtained on chemical modifications of smectites. These include replacement of exchangeable cations with protons, a process connected with smectite autotransformation – attack of protons on the layers and liberation of central atoms from the octahedral and tetrahedral sheets, causing modification of the acid sites on the ... ... hiện toàn bộ
Tập 38 Số 1 - Trang 127-138 - 2003
Infrared study of goethites of varying crystallinity and particle size: I. Interpretation of OH and lattice vibration frequenciesAbstract A detailed study of the IR spectrum of goethite is given with the aim of relating variations to crystalline order and particle size. The OH stretching vibrations are split into two active components at high frequency, plus two inactive ones at low frequency. Two different bending modes exist from site group splitting. Their active modes from factor group sp... ... hiện toàn bộ
Tập 21 Số 2 - Trang 191-200 - 1986
Infrared spectroscopy of ferrihydrite: evidence for the presence of structural hydroxyl groupsAbstract IR spectroscopy has shown that adsorbed water is almost completely removed from ferrihydrite by evacuation at room temperature. Absorption bands at 3615 and 3430 cm−1 appearing thereafter are interpreted as arising from OH groups located respectively at the surface and deeper in the structure. These groups are readily converted to OD on... ... hiện toàn bộ
Tập 14 Số 2 - Trang 109-114 - 1979