 | Köster, H. M., Ehrlicher, U., Gilg, H. A., Jordan, R., Murad, E., Onnich, K. (1999) Mineralogical and chemical characteristics of five nontronites and Fe-rich smectites. Clay Minerals, 34 (4) 579-599 doi:10.1180/000985599546460 | Journal (article/letter/editorial) | | Aussenstelle Bamberg, Concordiastr. 28, D-96049 Bamberg, Germany (Received 2 September 1998; revised 3 March 1999)...procedures. The structural formulae indicate one nontronite and one Fe-rich smectite to be montmorillonitic...The 18O/16O data suggest that fractionation of nontronite-water at ambient temperatures (1000 lna = 23...1980). The existence of a continuous beidellite±nontronite series was suggested on the basis of chemical...analyses by Ross & Hendricks (1945). However, a nontronite with montmorillonitic structure has been described |  | Nguetnkam, Jean Pierre, Villiéras, Fredéric, Kamga, Richard, Ekodeck, Georges Emmanuel, Yvon, Jacques (2014) Mineralogy and geochemical behaviour during weathering of greenstone belt under tropical dry conditions in the extreme North Cameroon (Central Africa) Geochemistry, 74 (2) 185-193 doi:10.1016/j.chemer.2013.06.007 | Journal (article/letter/editorial) | | Greenstone belt Dry tropical climate Weathering Nontronite Kaolinite Mass balance a b s t r a c t Mineralogy...and an Ah horizon. The results indicate that nontronite, a Fe-rich smectite, is the exclusive clay mineral...of the neoformed smectites, which are probably nontronite. SEM observations (Fig. 5) confirm their ferruginous...weathering are Fe rich smectites and are probably nontronite (Velde, 1995; Köster et al., 1999; Meunier, 2003)...and gave rise to the formation of Fe-smectites (Nontronite, Fe2 O3 > 15%) in the shells and the C horizon |  | Finck, N., Schlegel, M. L., Dardenne, K., Adam, C., Kraft, S., Bauer, A., Robert, J.-L. (2019) Structural iron in smectites with different charge locations. Physics and Chemistry of Minerals, 46 (7) 639-661 doi:10.1007/s00269-019-01028-y | Journal (article/letter/editorial) | | Accepted: 22 February 2019 © Springer-Verlag GmbH Germany, part of Springer Nature 2019 Abstract The versatile...out-of-plane Si/Al atoms at ~ 3.25 Å. In one Fe-rich nontronite, the detection of an O subshell at ~ 1.88 Å suggests...Technology (KIT), P.O. Box 3640, 76021 Karlsruhe, Germany 2 DEN‑Service d’Etudes Analytiques et de Réactivité...In contrast, reduction of the Fe-rich SWa-1 and Ölberg montmorillonites results in the formation of multiple...at the KIT Synchrotron Light Source (Karlsruhe, Germany) with a storage ring energy of 2.5 GeV, and at |  | | Journal (article/letter/editorial) | | smectite phase, most likely intergrade between nontronite and Fe-montmorillonite end-members, which evolved...D8-Advance diffractometer (Bruker Corp., Karlsruhe, Germany), using Cu-Kα radiation at 40 kV and 30 mA. Randomly...phase, with a composition intermediate between nontronite and Fe-montmorillonite end-members [27]. Minerals...Gl-Sm a b MLM 0.6 MLM 0.4 Fe-Al smectite Nontronite Symbols Fe-montmorillonite Fecal pellets ...formed was most likely an intergrade between nontronite and Minerals 2021, 11, x FOR PEER REVIEW 12 of |  | Tóth, Erzsébet, Weiszburg, Tamás G., Jeffries, Teresa, Williams, C. Terry, Bartha, András, Bertalan, Éva, Cora, Ildikó (2010) Submicroscopic accessory minerals overprinting clay mineral REE patterns (celadonite–glauconite group examples) Chemical Geology, 269 (3) 312-328 doi:10.1016/j.chemgeo.2009.10.006 | Journal (article/letter/editorial) | | smectitic starting material is referred to herein as nontronite, montmorillonite or ODFS (octahedralcharge dominated...more Glauconite–celadonite (the concentrate Nontronite → glauconite → celadonite may not represent the...chemistry of an Fe-rich montmorillonite from Ölberg, Germany. Clay Minerals 37, 283–297. Polgári, M., 2001 |  | | Journal (article/letter/editorial) | | edu) 4 Institut für Ostseeforschung Warnemünde, Germany The extinction near the P/Tr boundary, some 252...Marine Microbiology, Celsiusstr. 1, D-25389 Bremen, Germany (wnaqvi@mpi-bremen.de) During the Southwest Monsoon...samples from drill holes from three localities (Poty quarry, Olinda and Itamaracá island). C, O, Mg/Ca, Si...Paraíba coastal Basin as registered in the Poty quarry, Olinda and Itamaracá island localities, are similar...Geoscience, University of Tübingen, D-72076 Tübingen, Germany, 3 Université de Poitiers, FRE 3114 CNRS – HydrASA |
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