Material deposited from Clays and Clay Minerals

Vol. 56, April 2008
Surface area and layer charge of smectite from CEC and EGME/H₂O retention measurements - J. Ðrodo½ and D. McCarty
Figure 1b–d. Figure 1.  TGA-MS curves for representative Ca-smectites: (a) Wyoming montmorillonite, (b) Garfield nontronite, (c) Otay montmorillonite, (d) Ballarat saponite.  Black curve = weight loss, gray curve = relative intensity of mass 18 spectrum.  Weight changes from start to 110°C, start to 200°C, 200°C for 20 h, and from 200°C at 20 h to 900°C at 1 h are shown.
Figure 3. Amount of H₂O released at 200°C (WBW) compared to (a) layer charge, Q, per formula unit, (b) tetrahedral charge per formula unit. 
Figure 4. Amount of H₂O released above 200°C, after 20 h of isothermal heating (TBW) compared to layer charge, Q, per formula unit.
Figure 6. H₂O coverage compared with CEC_corr/TSSA_Nr ratio. The regression is used to refine the TSSA_Nr calculation (Table 7, column 9).
Figure 7. EGME coverage compared with CEC_corr/TSSA_Nr ratio.  The regression is used to refine the TSSA_Nr calculation (Table 8, column 9).
Figure 8. Relationship between WBW/TSSA_EXCH ratio and Q_s (approximated by Q from Table 1).  The regression is used in combination with equation 11 to calculate Q_s and TSSA_EXCH from WBW and CEC (Table 9, columns 7 and 9).
Table 2. Peak position data (in Å) from oriented XRD preparations of glycolated and air-dry (47%RH) <0.2 mm fractions of studied smectites. The glycolated samples demonstrate the lack of mixed-layering by the integral series of 00l reflections, and the air-dry samples – the nature of water complex (see text for details).  Trace mineral contaminants are also listed.
Vol. 56, February 2008
Pyroxene weathering to smectite: conventional and cryo-field emission scanning electron microscopy, Koua Bocca ultramafic complex, Ivory Coast – M. Velbel and W.W. Barker
Figure A1. Anaglyph of field of view in Figure 8, showing denticulated remnant with attached 'cornflake-textured smectite. Air-dried sample. UW-M LEO FEG-SEM at 2.0 kV.
Figure A2. Anaglyph (at slightly lower magnification) of field of view in Figure 9, showing smectite microboxwork separated from denticulated pyroxene by large pore spaces.  Air-dried sample.  UW-M LEO FEG-SEM at 2.0 kV.
Figure A3. Anaglyph (at slightly lower magnification) of field of view in Figure 10 showing smectite microboxwork with imbricated arrays of face-to-fce oriented layers with little interlamellar porosity. Air-dried sample. UW-M LEO FEG-SEM at 3.0 kV.
Figure A4. Anaglyph of Figure 14, showing biofilm covering denticulated pyroxene.  Note the detailed preservation of the texture of biofilm (microbial community and extracellular polysaccharides).  HPF/freeze-etched sample.  UW-M Hitachi S900 FEG-SEM at 1.5 kV.
Figure A5. Anaglyph of Figure 19, showing denticulated pyroxene with spongy, void-filling, porous smectite.  Note the ‘tube’ of partially detached wavy smectite on a denticle in the lower left.  HPF/freeze-etched sample.  UW-M Hitachi S900 FEG-SEM at 1.5 kV.
Vol. 56, February 2008
Geochemical records of a bentonitic acid-tuff succession related to a transgressive systems tract – indication of changes in the volcanic sedimentation rate - Z. Püspöki, M. Kozák, P. Kovács-Pálffy, J. Szepesi, R. McIntosh, P. Kónya, L. Vincze, and G. Gyula
Tables 1–3


Vol. 55, February 2007
Clay mineralogy of halloysite and alunite deposits in the Turplu area, Balikesir, Turkey - Ö. Isik Ece and Paul Schroeder
Deposited figures (4) and tables (4)

Vol. 54, October 2006
Fuzzy phase diagrams of clay minerals – Chandrika Varadachari
Table S1: Clay mineral compositions, membership values and thermodynamic values
Program developed in Mathematica for 2D representation of graded mineral zones
Program developed in Mathematica for 3D representation of graded mineral zones
 

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