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  • Slade, Phil G.; Gates, Will P. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    X-ray diffraction shows that ordered interlayer structures form when high-charged Llano vermiculite is reacted with HDTMA-Br or HDTMA-acetate, but the structures differ from those given by low-charged vermiculites. The ...
  • Gelfer, Mikhail Y.; Burger, Christian; Nawani, Pranav; Hsiao, Benjamin S.; chu, Benjamin; Si, Mayu; Rafailovich, Miriam; Panek, Grazyna; Jeschke, Gunnar; Fadeev, Alexander Y.; Gilman, Jeffrey W. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    Thermally induced lamellar structure changes due to phase transition and degradation in organoclays based on a synthetic ‘Somasif’ mineral and two organic surfactants, di-methyl dihydro-ditallow ammonia chloride (DMDTA) ...
  • Macedo, Thai´s R.; Petrucelli, Giovanni C.; Airoldi, Claudio (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    Somen-alk yldiamines with thege neral formulaeH 2N(CH2)nNH2 (n = 2-5) were intercalated into the layered silicic acid magadiite, from aqueous solution, causing an increase in the original interlayer distance of 1172 pm. ...
  • Rouse, Jason H.; Ferguson, Gregory S. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    X-ray diffraction has been used to study the sorption of water by multilayer films containing ordered stacksof alternating layersof an organic polyelectrolyte and individual plateletsof a smectite. The position and shape ...
  • Grygar, T.; Hradil, D.; Bezdicˇka, P.; Dousˇova´, B.; Cˇapek, L.; Schneeweiss, O. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    Two major species were identified in Fe-treated montmorillonite: monomeric or dimeric hydroxoaqua cations Fe(OH)x (3-x)+ (form I), and polymeric structures with edge-shared Fe(O,OH)6 (form II). These species have different ...
  • Kiipli, Tarmo; Kiipli, Enli; Kallaste, Toivo; Hints, Rutt; Somelar, Peeter; Kirsima¨e, Kalle (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    The composition of altered volcanic ash of the Late Ordovician Kinnekulle bed was studied in geological sections of the Baltic Paleobasin. The composition of altered ash varies with paleosea depth from northern Estonia to ...
  • Kyle, Jennifer E.; Schroeder, Paul A. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    A siliceous sinter collected from Octopus Spring in Yellowstone National Park, USA contains an occluded volcanic rock fragment that has undergone alteration. The sinter piece beyond the fragment is mostly dominated by ...
  • Sindern, Sven; Stanjek, Helge; Hilgers, Christoph; Etoundi, Yvonne (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    Investigation of material from three core sections of the RWTH-1 drill-hole in the Wurm syncline of Aachen, Germany, shows mineralogical and structural evidence of intensive hydrothermal activity in the footwall of the ...
  • Caulfield, Jeffrey A.; Wells, Todd A.; Miller, Keith E. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    A novel method for the analysis of clay minerals using Fourier transform infrared spectroscopy is presented. Clay mineral suspensions are dried on a Si wafer substrate for transmission infrared (IR) analysis. Four natural ...
  • Tunega, Daniel; Goodman, Bernard A.; Haberhauer, Georg; Reichenauer, Thomas G.; Gerzabek, Martin H.; Lischka, Hans (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    An ab initio theoretical approach has been used to calculate optimized geometries and the relative energies of various compositional arrangements in structures of dioctahedral smectites based on models consisting of two ...
  • Kuznicki, Steven M.; Lin, Christopher C. H.; Bian, Junjie; Anson, Alejandro (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    Natural zeolites may represent one of the greatest under-utilized resources of the mineral world. Even with their unique character and properties, issues of consistency, homogeneity and purity preclude them from many premium ...
  • Neuhoff, Philip S.; Wang, Jie (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    A calorimetric method for determining isothermal partial and integral heats of hydration reactions (DH¯ R,T,P and DH˜ R,T,P, respectively) in zeolites and other mineral hydrates is presented. The method involves immersing ...
  • Balan, Etienne; Fritsch, Emmanuel; Allard, Thierry; Calas, Georges (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    The tropical weathering of sedimentary kaolin deposits from the plateaux surrounding Manaus (Alter do Chao formation, Amazon basin, Brazil) leads to the in situ formation of thick kaolinitic soils. The structural changes ...
  • Drits, Victor A.; Lindgreen, Holger; Sakharov, Boris A.; Jakobsen, Hans Jørgen; Fallic, Anthony E.; Salyn, Alfred L.; Dainyak, Lidia G.; Zviagina, Bella B.; Barfod, Dan N. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    In the Nuussuaq Basin, West Greenland, a thick succession of Tertiary dolerites has penetrated Upper Cretaceous mudstone. The mixed-layer minerals of mudstone core samples have been analyzed by X-ray diffraction, solid-state ...
  • Jime´nez-milla´n, Juan; Va´zquez, Mercedes; Velilla, Nicola´s (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    Naturally deformed biotite in contact-metamorphosed slates affected by a shear zone of the Southern Iberian Massif near Jae´n (SE Spain) were studied by X-ray diffraction, optical microscopy, scanning electron microscopy, ...
  • Bobos, Iuliu; Vieillard, Philippe; Charoy, Bernard; Noronha, Fernando (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    The alteration of spodumene to cookeite has been identified in a Li-bearing aplite-pegmatite from northern Portugal. Optical microscopy and scanning and transmission electron microscopy (SEM/ TEM) were used to characterize ...
  • Villar, M. V. (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    This work presents the water retention curves obtained for two natural bentonites compacted at different dry densities. The density of the bentonite was kept constant during the determination, for which specific methodologies ...
  • Trolard, Fabienne; Bourrie´, Guilhem; Abdelmoula, Mustapha; Refait, Philippe; Feder, Fre´de´ric (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
    Fougerite (IMA 2003-057) is a mixed M(II)-M(III) hydroxysalt of the green rust group, where M(II) can be Fe or Mg, and M(III) is Fe. The general structural formula is: [Fe2+ 1-xFe3+ x Mgy(OH)2+2y]+x[x/n A-n.mH2O]-x where ...
  • Unknown author (The Clay Minerals SocietyThe Clay Minerals Society, 2007)
  • Unknown author (The Clay Minerals SocietyThe Clay Minerals Society, 2007)