Results 221 to 230 of about 14,521 (250)

Neptunium(V) sorption onto gibbsite

Radiochimica Acta, 2009
The sorption behavior of neptunium(V) on gibbsite (γ-Al(OH) 3 ) was studied by batch experiments in the presence/absence of ambient CO 2 as a function of solid-to-liquid ratio, pH, ionic strength, and Np(V) concentration. The sorption of 8 × 10 -6 M Np(V) at ionic strength of 0.1 M NaClO 4 was proportional to the solid-to-liquid ratio of gibbsite ...
T. Wu, S. Amayri, T. Reich
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Gibbsite‐Kaolinite Equilibria

Soil Science Society of America Journal, 1967
Abstract In order to help determine if the equilibria reached by soil mineral mixtures is that predicted on the basis of single minerals, two kaolinite samples were equilibrated individually and also with gibbsite of known stability. One set of samples was equilibrated from undersaturation, the other from supersaturation. Samples were
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Halloysite and Gibbsite Formation in Hawaii

Clays and clay minerals (National Conference on Clays and Clay Minerals), 1960
AbstractDesilication and removal of bases from the basalitic rocks of the Hawaiian Islands produces large amounts of halloysite and gibbsite, together with variable quantities of allophane and nontronite, iron and titanium oxides, and amorphous mineral and gel material.The nature and relative abundance of intermediate and end products of weathering ...
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Atomistic Modeling of Gibbsite:  Cation Incorporation

The Journal of Physical Chemistry B, 2001
Computer modeling techniques provide a useful mechanism with which to model the morphology of defect crystals. In this work, a study of the incorporation of sodium and potassium cations into the morphologically important surfaces of gibbsite was conducted.
Sean D. Fleming, Andrew L. Rohl, Steve C. Parker, Gordon M. Parkinson   +3 more
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Fluorescent Gibbsite from Yunnan Province, China

Rocks & Minerals, 2003
(2003). Fluorescent Gibbsite from Yunnan Province, China. Rocks & Minerals: Vol. 78, No. 2, pp. 110-111.
William T. Lawrence, Robert J. Lauf, Dixie L. Barker   +2 more
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Electrorheological properties of mechanically activated gibbsite

International Journal of Inorganic Materials, 2001
Abstract Change in the surface state during milling of gibbsite (GB) is elucidated by electrorheological properties of the suspension comprising GB and silicone oil. Under dc electrical field up to 2 kV/mm, milling brings about remarkable increase in the yield stress, e.g., milling GB for 3 h increases 100 times the yield stress at 2 kV/mm. Amount of
Makoto Kitamura, Mamoru Senna
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Thermal decomposition of mechanically activated gibbsite

Thermochimica Acta, 1999
Abstract Gibbsite (AlOH)3 was mechanically activated by grinding for 20 h, and the changes in its structure were studied by thermal analysis, X-ray powder diffraction and 27 Al MAS NMR. Grinding caused the rupture of a significant proportion of the Al–OH bonds, but the resulting molecular water was immediately adsorbed on to the activated ...
Kenneth J.D.MacKenzie, Jadammbaa Temuujin, Kiyoshi Okada   +2 more
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A Gibbsite-Cemented Quartz Sandstone

SEPM Journal of Sedimentary Research, 1984
ABSTRACT A gibbsite-containing quartz sandstone occurs near Fort Walton, Florida. Scanning electron micrographs show the gibbsite of the matrix to be anhedral which is the typical morphology in many deposits of bauxite. At the contact surface with the quartz grains, however, the gibbsite crystals are euhedral, as if recrystallized from solution.
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Gibbsite in the weathered dartmoor granite

Geoderma, 1971
Abstract Gibbsite encountered in the weathered Dartmoor granite is an initial product of the weathering process; its occurrence is not indicative of an earlier humid tropical environment.
C.P. Green, M.J. Eden
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ANION ADSORPTION BY GOETHITE AND GIBBSITE

Journal of Soil Science, 1972
Summary The relationship between adsorption and pH, termed the adsorption envelope, varies with the p K a, of the conjugate acid of the anion, for several adsorbents in presence of an excess of specifically adsorbed anions.
F. J. HINGSTON, A. M. POSNER, J. P. QUIRK   +2 more
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