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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. Środoń,
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 CECcorr/TSSANr
ratio. The regression is used to refine the TSSANr
calculation (Table 7, column 9).
Figure 7.
EGME
coverage compared with CECcorr/TSSANr
ratio. The regression is used to refine the TSSANr
calculation (Table 8, column 9).
Figure 8.
Relationship between WBW/TSSAEXCH ratio and Qs
(approximated by Q from Table 1). The regression is used in
combination with equation 11 to calculate Qs and TSSAEXCH
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. Işik Ece and
Paul Schroeder
Deposited figures
(4) and tables (4)
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