
	Where results make sense

Topic: Gibbsite

Related Topics

Corundum

Iron oxide

Bauxite

Chemical formula

Sandpaper

Haloragales

Caryl Churchill

Sea bass

Movietone

20th Century Fox

News Corporation

In the News (Fri 10 Jul 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Gibbsite
		Gibbsite's structure is interesting and analogous to the basic structure of micas.
		Gibbsite's structure is closely related to the structure of brucite[?], Mg(OH)2.
		Gibbsite is interesting for another reason because it is often found as a part of the structure of other minerals.
	www.ebroadcast.com.au /lookup/encyclopedia/gi/Gibbsite.html (436 words)

	Gibbsite - Wikipedia, the free encyclopedia
		Gibbsite and bayerite are monoclinic, whereas doyleite and nordstrandite are triclinic forms.
		The structure of gibbsite is interesting and analogous to the basic structure of the micas.
		It is the gibbsite layer that in a way forms the "floor plan" for the mineral corundum, Al The basic structure of corundum is identical to gibbsite except the hydroxides are replaced by oxygen.
	en.wikipedia.org /wiki/Gibbsite (509 words)

	Gibbsite
		Gibbsite is a secondary mineral mainly of tropical and subtropical occurence.
		Gibbsite, diaspore and boehmite may occur in varying proportions, and any one of the three minerals may dominate to the almost complete exclusion of the other two.
		Gibbsite is very stable under most earth surface conditions, but may alter in special conditions to clay minerals, such as the kaolin minerals.
	www.soils.wisc.edu /virtual_museum/gibbsite/content.html (617 words)

	[No title] (Site not responding. Last check: 2007-11-06)
		Samples of the iron pisolite and the gibbsite nodular zones from the upper portion of the weathering profile of drill core from Columbia County, Oregon, and Cowlitz County, Washington, were analyzed by instrumental neutron activation.
		Gibbsite occurs with poorly crystalline goethite and hematite in the gibbsite nodular zone.
		Ratios between gibbsite nodules and parent basalt of the immobile elements Hf, Ta, Fe, Ti, Th and Cr suggest that the nodules, where the relic textures are preserved, have undergone volume reduction.
	nwdata.geol.pdx.edu /Thesis/Abstract.php?Th_ID=100 (582 words)

	Theses from Umeå University: 6 - Surface chemistry of Al and Si (hydr)oxides, with emphasis on nano-sized gibbsite ... (Site not responding. Last check: 2007-11-06)
		Nano-sized gibbsite was synthesized and thoroughly characterized using X-ray diffraction, high-resolution transmission electron microscopy, atomic force microscopy and Fourier transform infrared spectroscopy.
		The adsorption of protons and the development of charge at the surfaces were studied using high precision potentiometry and zeta potential measurements.
		The adsorption of o-phthalate, maleate, fumarate, malonate and oxalate onto gibbsite surfaces was studied using Fourier transform infrared spectroscopy, zeta potential measurements, adsorption measurements and theoretical frequency calculations.
	www.diva-portal.org /umu/theses/abstract.xsql?dbid=6 (412 words)

	Bauxite Geology (Site not responding. Last check: 2007-11-06)
		The three structural forms of bauxite are Gibbsite, Böhmite and Diaspore.
		Gibbsite is a true aluminium hydroxide and Böhmite and Diaspore are both aluminium-oxide-hydroxides.
		Of the bauxite ores currently being mined the dominant form is Gibbsite, followed by a mixed ore of Gibbsite and Böhmite.
	www.world-aluminium.org /production/mining/geology.html (460 words)

	Gibbsite
		The genesis of halloysite and gibbsite from mugearite on the island of Maui (Technical bulletin / Hawaii Agricultural Experiment Station)
		Occurrence of gibbsite on the island of Kauai, Hawaiian Islands
		Reactions of ammonium phosphate with gibbsite and with montmorillonitic and kaolinitic soils (Hawaii.
	www.veryhappening.com /things/gibbsite (143 words)

	Kaolinite and Gibbsite Weathering of Biotite within Saprolites and Soils of Central Virginia -- Jolicoeur et al. 64 ...
		Kaolinite and Gibbsite Weathering of Biotite within Saprolites and Soils of Central Virginia -- Jolicoeur et al.
		from the weathering of biotite being gibbsite (Fig.
		being the absence of gibbsite in soils on north-facing slopes
	soil.scijournals.org /cgi/content/full/64/3/1118 (4930 words)

	Kinetics of gibbsite dissolution under low ionic strength conditions
		This agreement shows that the gibbsite dissolution rate is independent of stirring rate and therefore supports the conclusion of Bloom and Erich that gibbsite dissolution reaction is surface controlled and not diffusion controlled.
		The mass of gibbsite in the cell was decreased during the experiment as a result of its dissolution.
		To examine the validity of the second possibility, a specific reaction mechanism for the gibbsite dissolution in the presence of perchloric acid is postulated.
	www.bgu.ac.il /geol/ganor/papers/GCA427/GCA427.htm (8945 words)

	scheckel99ssm
		We examined the Ni sorption kinetics on a stoichiometric mixture of gibbsite and silica similar to pyrophyllite using a pH-stat batch technique, X-ray absorption fine structure (XAFS) and diffuse reflectance (DRS) spectroscopies, high-resolution thermogravimetric analysis (HRTGA), and high-resolution transmission electron microscopy (HRTEM).
		Replenishment dissolution experiments using nitric acid, EDTA, oxalate, and acetylacetone were conducted on Ni precipitates formed on pyrophyllite, gibbsite, amorphous silica, and the gibbsite/silica mixture after residence times ranging from one hour to one year.
		While the stability of the Ni precipitates on gibbsite and silica independently were much less than that of pyrophyllite, the gibbsite/silica mixture resulted in Ni precipitates whose stability
	ag.udel.edu /SoilChem/scheckel99ssm.html (220 words)

	A New Route to the Synthesis of Fine-Grain Gibbsite (Site not responding. Last check: 2007-11-06)
		A New Route to the Synthesis of Fine-Grain Gibbsite
		One of the parameters, which considerably affected the nature of the resulting aluminum hydroxide, has been the concentration of ammonia solution used to precipitate the aluminum gel together with the amount of aged sample.
		This is the path characteristic of gibbsites with fine grain.
	pubs.acs.org /cgi-bin/jtext?cmatex/13/i08/abs/cm011007y (179 words)

	Example 6.-- Reaction-Path Calculations
		Selected results for simulations A1-A4 are presented in table 14 and are plotted on figure 2 as points A, B, D, and F. The stability fields for the phases, which are based on the thermodynamic data, are outlined on the figure and are not calculated by the modeling in these simulations.
		In simulation A5, point C is calculated by allowing microcline to dissolve to a point where kaolinite is at saturation and is present in the phase assemblage, while gibbsite is at saturation, but not present in the phase assemblage.
		A simpler approach to determining the reaction path is simply to react microcline incrementally, allowing the stable phase assemblage among gibbsite, kaolinite, muscovite, and microcline to form at each point along the path.
	wwwbrr.cr.usgs.gov /projects/GWC_coupled/phreeqc.v1/html/phqc_57.htm (1084 words)

	Fluorescent gibbsite from Yunnan Province, China Rocks & Minerals - Find Articles (Site not responding. Last check: 2007-11-06)
		Because the gibbsite is associated with iron hydroxides, the green color could be due to traces of ferrous ([Fe.sup.+2]) iron.
		It should be noted that ultraviolet fluorescence is not unknown in gibbsite.
		Robbins (1994) reported that gibbsite from several localities fluoresces white under longwave and green under shortwave ultraviolet radiation.
	www.findarticles.com /p/articles/mi_m0GDX/is_2_78/ai_98370211 (697 words)

	Answers to Homework Assignment #1
		#3 Calculate the concentration of dissolved Al in equilibrium with gibbsite at a pH of 4 and 5 C using the data from (a) Appendix II and (b) Appendix III.
		To obtain the solubility of gibbsite at 5 C instead of 25 C, use the van't Hoff equation to calculate K at the lower temperature, and then solve for (Al So, the van't Hoff equation is: log K
		The solubility of gibbsite increases with decreasing temperature.
	www.usu.edu /geol5600/answers1.htm (620 words)

	Gibbsite Gallery (Site not responding. Last check: 2007-11-06)
		Hemispheres of second generation of gibbsite, on the top is white calcite.
		A 2 mm group of water-clear gibbsite crystals on white natrolite.
		A 2 mm twinned crystal of Gibbsite from the Saga 1 quarry, Tvedalen in the Langesundsfjord-area, Norway.
	www.mindat.org /gallery.php?min=1689 (208 words)

	Surface-Induced Nickel Hydroxide Precipitation in the Presence of Citrate and Salicylate -- Yamaguchi et al. 65 (3): ...
		Ni by gibbsite and pyrophyllite in the presence of citrate and
		from gibbsite or pyrophyllite in the presence of salicylate
		The role of Al in the formation of secondary precipitates on pyrophyllite, gibbsite, talc, and amorphous silica: A DRS study.
	soil.scijournals.org /cgi/content/full/65/3/729 (3823 words)

	Soil Under a Microscope - Slide 60 \| NRCS Soils
		Gibbsite is a mineral found in highly weathered soils such as Ultisols and Oxisols and under special circumstances, in Inceptisols and Andisols.
		The aluminum oxyhydrate (AlO-OH3) crystallizes when soil pH > than about 5.5 and the most common mineral is gibbsite.
		(a) shows a gibbsitic nodule (X50) with whitish gibbsite crystals and with well defined crystals at X 5,000 (b).
	soils.usda.gov /use/worldsoils/microscope/tsld060.html (82 words)

	Gibbsite and Alumina Quality
		Research for the project, Gibbsite and Alumina Quality (P575), is being conducted by the highly regarded research team at the AJ Parker Centre for Hydrometallurgy (CSIRO Minerals).
		The main objective of the extended project is to better understand how the properties of the gibbsite (aluminium hydroxide) produced in the precipitation step of the refining process relates to the quality of the subsequent smelter grade alumina produced in the calcination step.
		Dr Bagshaw said researchers are using sophisticated instruments and techniques to characterise the external and internal structures of the gibbsite and alumina particles to determine the attributes that gibbsite needs to become good alumina.
	www.amira.com.au /documents/Events/alumina.asp (356 words)

	JCE 2005 (82) 453 [Mar] Intercalates—Exciting Compounds for Solid–State Chemistry Studies
		This article describes a laboratory exercise that investigates the incorporation of the guest anion hexacyanoferrate(III) into the layered structure of lithium gibbsite chloride, and its subsequent removal from the lattice with sodium carbonate.
		X-ray diffraction is used to study the change in interlayer spacing, d upon incorporation of the guest ion into the lithium gibbsite structure.
		In this experiment, the large guest hexacyanoferrate(III) anion enters the host lithium gibbsite chloride lattice, displacing the smaller chloride ion and causing an increase in the d spacing.
	jchemed.chem.wisc.edu /Journal/Issues/2005/Mar/abs453.html (379 words)

	GIBBSITE (Aluminum Hydroxide)
		Bauxite is often thought of as a mineral but is really a rock composed of aluminum oxide and hydroxide minerals such as gibbsite,
		Color is white or colorless with shades of gray, blue and green.
		In many bauxite specimens gibbsite is found in a pisolitic habit.
	mineral.galleries.com /minerals/oxides/gibbsite/gibbsite.htm (536 words)

	gibbsite - OneLook Dictionary Search
		We found 12 dictionaries with English definitions that include the word gibbsite:
		Tip: Click on the first link on a line below to go directly to a page where "gibbsite" is defined.
		Gibbsite : Online Plain Text English Dictionary [home, info]
	www.onelook.com /?w=gibbsite (122 words)

	Gibbsite solubility and the Al concentration in water as a function of pH (Site not responding. Last check: 2007-11-06)
		Gibbsite solubility and the Al concentration in water as a function of pH
		The Al concentration is adapted to equilibrium with gibbsite.
		The figure shows that the Al concentration may become quite high at low and high pH, in fact exceeding the drinking water limit of 0.2 mg Al / L.
	www.xs4all.nl /~appt/exmpls/gibbsite.html (98 words)

	SME--VIRTUAL ATLAS OF OPAQUE AND ORE MINERALS (via CobWeb/3.1 planetlab1.netlab.uky.edu) (Site not responding. Last check: 2007-11-06)
		The matrix, which is light red-brown due to finely disseminated iron minerals, comprises gibbsite and boehmite which were identified by X-ray diffraction.
		An angular haematitized clast comprises banded haematite (white, centre left) with variations in reflectance that are related to grain size and crystallinity of the haematite.
		The dark brown-grey matrix is a mixture of gibbsite and boehmite.
	www.smenet.org.cob-web.org:8888 /opaque-ore/Plate49.htm (349 words)

	Molecular dynamics modeling of clay minerals. 1. gibbsite, kaolinite, pyrophyllite, and beidellite. (Site not responding. Last check: 2007-11-06)
		Also, atonidc point charges were derived from comparisons of ab initio molecular electrostatic potentials with X-ray diffraction-based deformation electron densities.
		Isothermal-isobaric molecular dynamics simulations of quartz, gibbsite, kaohnite, and pyrophyllite were used to refine the potential energy parameters.
		The resultant force field reproduced all the major structural parameters of these minerals to within 1% of their experimentally determined values.
	www.uga.edu /~srel/Reprint/2152.htm (243 words)

	Gibbsite Mineral Data
		Comments: Botryoidal spheres of doyleite growing along with its dimorph gibbsite.
		Balan E, Lazzeri M, Morin G, Mauri F, American Mineralogist, 91 (2006) p.115-119, First-principles study of the OH-stretching modes of gibbsite, Locality: hypothetical structure calculated with DFT
		Tough - Difficult to break apart as shown by fibrous minerals and most metals.
	webmineral.com /data/Gibbsite.shtml (238 words)

	INFLUENCE OF GIBBSITE SURFACE AREA AND CITRATE ON Ni SORPTION MECHANISMS AT pH 7.5 -- Yamaguchi et al. 50 (6): 784 -- ...
		INFLUENCE OF GIBBSITE SURFACE AREA AND CITRATE ON Ni SORPTION MECHANISMS AT pH 7.5 -- Yamaguchi et al.
		We investigated the sorption of Ni to gibbsite of two different
		extend the hexagonal arrangement of Al atoms in gibbsite.
	ccm.geoscienceworld.org /cgi/content/abstract/50/6/784 (236 words)

	Three-Dimensional Reconstruction of Microstructures in Gibbsite Using Charge Contrast Images (Site not responding. Last check: 2007-11-06)
		Summary: An iterative process of serial sectioning and charge contrast imaging has been applied to gibbsite particles embedded in epoxy resin.
		The features observed in the two-dimensional sections have been reconstructed into three-dimensional (3-D) objects, so that the volumetric relationships in the microstructure are visualised.
		The 3-D objects confirm that the image detail present in charge contrast images of gibbsite is related to the microstructure and the processes occurring during the crystallisation of gibbsite.
	www.scanning-fams.org /scanabstracts/SCANNING02/24018.html (180 words)

	BIOMIMETIC CO-ASSEMBLY OF GIBBSITE AND MESOPHASES: A NOVEL SYNTHESIS ROUTE BY DEVITRIFICATION OF GEL DERIVED FROM ...
		BIOMIMETIC CO-ASSEMBLY OF GIBBSITE AND MESOPHASES: A NOVEL SYNTHESIS ROUTE BY DEVITRIFICATION OF GEL DERIVED FROM HYDROTHERMAL ALUMINOSILICATE/CTAB SOLUTION -- Fahn et al.
		(1) gibbsite preferentially nucleated at the gel/air and gel/glass
		of gibbsite and the lamellar mesophase was initially interface
	ccm.geoscienceworld.org /cgi/content/abstract/52/4/451 (307 words)

	Polyhedral Models (Site not responding. Last check: 2007-11-06)
		Gibbsite, Al Drag to rotate, shift-drag to zoom
		Note: In the space-filling representations too large a value has been used for the H
		This page created by George Lisensky, Beloit College.
	mrsec.wisc.edu /Edetc/pmk/gibbsite.html (61 words)

Try your search on: Qwika (all wikis)