 | | Journal (article/letter/editorial) | | to rod-shaped bacteria. Associated abiogenic allophane had an Al/Si ratio ranging from 1.01 to 2.13....corresponding to compositions between proto-imogolite allophane and chamosite. These Al-Si-Fe minerals were the...Group II exhibited poorly-developed aggregates of allophane-like granular materials composed mainly of Al...the porewaters were saturated with respect to allophane and other crystalline clay minerals such as halloysite...mainly Si, Al and Fe, in the porewaters. Key Words—Allophane, Bacteria, Bacterial Mineralizati on, Cell Surface |  | | Journal (article/letter/editorial) | | ADENINE, ADENOSINE, RIBOSE AND 5’-AMP ADSORPTION TO ALLOPHANE H I D E O H A S H IZ U M E 1 , * 1 2 AN D B...Research, Private Bag 11052, Palmerston North 4442, New Zealand Abstract—We have investigated the adsorption...ribose, and adenosine-5’-phosphate (5’-AMP) by allophane at pH 4, 6 and 8. Adenine, adenosine and ribose...and decreased in the order: pH 8 > pH 6 > pH 4. Allophane had a greater affinity for 5’-AMP than for adenine...known high phosphate-retention capacity of allophane and allophane-rich soils. The experimental data may be |  | | Journal (article/letter/editorial) | | or decorated by either massive aggregates of allophane-like granular materials or irregular aggregates...chemical compositions similar to proto-imogolite allophane, whereas the smectite-like fibers and/or flakes...corresponding to the compositional field between allophane and nontronite. The volcanic ash contains about...< kaolinite < montmorillonite < allophane < nontronite. The allophane-like granular minerals seems to...transformed from the allophane-like materials as a intermediate phase between allophane and nontronite by |  | | Journal (article/letter/editorial) | | development of amorphous clay minerals (e.g. allophane, opal, palagonite), but occurs at a much slower...increase in the amounts of amorphous clay minerals (allophane, palagonite) increases the proportion of unfrozen...ablation, and the development of glaciers. Key Words—Allophane, Amorphous Clay, Climate Change, Cold Climate... Helens, USA, (Driedger, 1980) and for the tephra that erupted in 1996 at Mt. Ruapehu, New Zealand, (Manville...Abramov et al., 2008), Mexico (Palacios et al., 2007), New Zealand (Manville et al., 2000), North America (Froese |  | Zhu, Chen, Donald Rimstidt, J., Zhang, Yilun, Kang, Jinting, Schott, Jacques, Yuan, Honglin (2020) Decoupling feldspar dissolution and precipitation rates at near-equilibrium with Si isotope tracers: Implications for modeling silicate weathering. Geochimica et Cosmochimica Acta, 271. 132-153 doi:10.1016/j.gca.2019.12.024 | Journal (article/letter/editorial) | | Sciences, Indiana University, Bloomington, IN 47405, USA 2 Doctoral Program in Environmental Science, Indiana...Indiana University, Bloomington, IN 47405, USA 3 Northwest University, State Key Laboratory Continental...Geological Sciences, Virginia Tech, Blacksburg, VA 24061, USA 5 Géosciences Environnement Toulouse, CNRS-UPS-OMP...respect to amorphous Al(OH)3, gibbsite, quartz, allophane, imogolite, and kaolinite. The SI of the solutions...others did not (Gautier et al., 1994). New experimental methods and new types of data must be introduced to |  | Bishop, Janice L., Ethbrampe, Eliza B., Bish, David L., Abidin, Zaena L., Baker, Leslie L., Matsue, Naoto, Henmi, Teruo (2013) Spectral and Hydration Properties of Allophane and Imogolite. Clays and Clay Minerals, 61 (1) 57-74 doi:10.1346/ccmn.2013.0610105 | Journal (article/letter/editorial) | | 2013. SPECTRAL AND HYDRATION PROPERTIES OF ALLOPHANE AND IMOGOLITE J A NI C E L . B I S HO P 1 , *...Mountain View, CA 94043, USA 2 NASA-JSC, Mail Code KA, Houston, TX 77058, USA 3 Department of Geological...University, 1001 E. 10th St., Bloomington, IN 47405, USA 4 Faculty of Agriculture, Ehime University, Tarumi...Perimeter Drive MS 2339, Moscow, ID 83844, USA Abstract—Allophane and imogolite are common alteration products...not identical for allophane and imogolite. In the near-infrared (NIR) region, allophane spectra exhibited |  | Ziegler, Karen, Hsieh, Jean C.C, Chadwick, Oliver A, Kelly, Eugene F, Hendricks, David M, Savin, Samuel M (2003) Halloysite as a kinetically controlled end product of arid-zone basalt weathering. Chemical Geology, 202 (3) 461-478 doi:10.1016/j.chemgeo.2002.06.001 | Journal (article/letter/editorial) | | Barbara, CA 93106, USA b ChevronTexaco, 3901 Briarpark Drive, Houston, TX 77042, USA c Department of Soil...Colorado State University, Ft. Collins, CO 80523, USA d Department of Soil, Water and Environmental Science...Science, University of Arizona, Tucson, AZ 85721, USA e Department of Geological Sciences, Case Western...Western Reserve University, Cleveland, OH 44106, USA Received 2 November 2001; received in revised form 25...increasing soil age; its growth is at the expense of allophane, which, in turn, forms at the expense of primary |  | | Journal (article/letter/editorial) | | Copyright © 2002 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/02 $22.00 ⫹ .00 Pergamon...Sciences, Cornell University, Ithaca, NY 14853, USA Department of Geography, University of California...California, Santa Barbara, Santa Barbara, CA 93106, USA (Received March 8, 2001; accepted in revised form November...secondary soil aluminosilicates (principally allophane). Further Si loss and changes in mineralogy as...attaining high Ge/Si ratios. Laboratory synthesis of allophane confirms that Ge is preferentially partitioned |  | | Journal (article/letter/editorial) | | Waikato, Hamilton 3240, New Zealand 4 Landcare Research, Palmerston North 4442, New Zealand 2 3 (Received...Hillier) A B S T R AC T : New insights from the recent literature are summarized and new data presented concerning...(2005) and Guggenheim (2015). In addition, some new data are presented. F O R M AT I O N Like kaolinite...extensive deposits of halloysite at Carlsbad Cavern, New Mexico (Polyak & Güven, 1996), Djebel Debbagh, Algeria...source of halloysite, at Matauri Bay in northern New Zealand, was thought to have been formed by hydrothermal |  | | Journal (article/letter/editorial) | | Department, Middlebury College, Middlebury, VT 05753, USA Abstract—Soils developed on Pleistocene andesitic...include gibbsite, goethite, hematite, maghemite, allophane and amorphous Al hydroxides. Active floodplain...dominated by 10 Å halloysite and contain less allophane, while soil clays from Pleistocene terraces consist...transformations of 10 Å halloysite to 7 Å halloysite and allophane to amorphous Al hydroxides with time. The presence...paralleled by the formation of dioctahedral clay, allophane and Al hydroxides. Analysis by QXRD also indicates |  | | Journal (article/letter/editorial) | | northeastern California were determined. Sesquioxidic allophane with a high CEC delta value dominates the clay...weathered saprolite has the properties of halloysitic allophane. Halloysite, present in all saprolites, is highest...sesquioxidic allophane during early stages of weathering and its transformation to halloysitic allophane and halloysite...amorphous alkali-soluble component, judged to be allophane, appears in the early stages of weathering. In... halloysitic components increase relative to allophane. In the present paper, clay extracted from saprolite |  | | Journal (article/letter/editorial) | | 261-268, 1979. THE ADSORPTION OF YEAST RNA BY ALLOPHANE D, H, TAYLOR I AND A. T. WILSON Department...Department of Chemistry, University of Waikato, Hamilton, New Zealand Abstract-Phosphate in the form of organic...bound in soils containing the aluminosilicate allophane. A significant part of this phosphorus is believed...of yeast RNA with allophane was studied to further the understanding of the allophane/organi.: macro··...allophanic soils. The extent of RNA adsorption on the allophane was dependent upon the pH, the charge and concentration |  | | Journal (article/letter/editorial) | | Minerals, Vol. 50, No. 2, 145–156, 2002. ORIGIN OF ALLOPHANE AND RETARDATION OF PEBBLE WEATHERING IN QUATERNARY...weathering. Restricted to the sandy gravel layers, allophane gel either replaced bytownite sands to form a...a pseudomorph or coated the pebbles. The allophane has an average Al/Si atomic ratio of 1.5 with 45% H2O...the formation of allophane. In the sandy gravel layers, pebbles coated with allophane gel were almost...highly weathered to form halloysite-rich clays. Allophane gels acted as a somewhat impermeable geochemical |  | Chadwick, Oliver A, Gavenda, Robert T, Kelly, Eugene F, Ziegler, Karen, Olson, Carolyn G, Elliott, W.Crawford, Hendricks, David M (2003) The impact of climate on the biogeochemical functioning of volcanic soils. Chemical Geology, 202 (3) 195-223 doi:10.1016/j.chemgeo.2002.09.001 | Journal (article/letter/editorial) | | Barbara, CA 93106, USA b USDA Natural Resources Conservation Service, Kealakekua, HI 96750, USA c Department...Colorado State University, Ft. Collins, CO 80523, USA d USDA Natural Resources Conservation Service, Soil... NE 68508, USA e Department of Geology, Georgia State University, Atlanta, GA 30303, USA f Department...Science, University of Arizona, Tucson, AZ 85721, USA Received 2 November 2001; received in revised form...B.V. Keywords: Andisols; Thresholds; Hawaii; Allophane; Halloysite 1. Introduction Soil acts as an important |  | | Journal (article/letter/editorial) | | 44, No, 4, 485-491, 1996. SIZE AND SHAPE OF ALLOPHANE PARTICLES IN DISPERSED AQUEOUS SYSTEMS JUTARO...Chiba-shi, 261 Japan Abstract-Aqueous suspensions of allophane show relatively high viscosity, presumably because...measured the particle weight and particle size of allophane during a dispersion using the light scattering...experimental findings show that the unit particles of allophane within dilute dispersions appear to be associated...between dispersion and coagulation, Key Words-Allophane, Cluster, Colloid, Domain, Light Scattering, Shape |  | | Report (chapter) | | discussed many examples of tephra and lava soils in New Zealand. The work by Shoji et al. (1993) is the most...as those for Japan (Shoji et al. 1993, p. 95) and New Zealand (Hewitt 1989), include classes for volcanic...They are primarily the hydrous aluminosilicates, allophane and imogolite; the iron hydroxide, ferrihydrite...andesites, Mt Egmont, New Zealand (table 11.5); 5 Dac, dacite, Tauhara complex, New Zealand (table 11.6);...composition of rhyolites from Taupo Volcanic Zone, New Zealand (table 11.6); 7 T-Rhy, tephra: Plinian W-tephra |  | Joussein, E., Petit, S., Churchman, J., Theng, B., Righi, D., Delvaux, B. (2005) Halloysite clay minerals — a review. Clay Minerals, 40 (4) 383-426 doi:10.1180/0009855054040180 | Journal (article/letter/editorial) | | Landcare Research, Private Bag 11052, Palmerston North, New Zealand, and 4 Universite Catholique de Louvain...halloysite (Fig. 2) a number of halloysites from New Zealand. Since appears to be related to crystallization...similar observations for spheroidal halloysite from New Zealand where, in many cases, the cores of the cylinders...Kirkman (1977) failed to detect the presence of allophane between its layers by SEM. Tubular halloysite...of the three main morphologies of halloysite from New Zealand: (a) spheroidal (Opotiki); (b) short-tubes |  | | Journal (article/letter/editorial) | | hisingerite and synthetic nanoaluminosilicate allophane. Fitting procedures for XAFS spectra were established...was concluded: (1) Fe in both hisingerite and allophane is present in well-defined octahedral sites, (2)...observed in hisingerite and allophane than in smectites, and (3) Fe in allophane is present in small clusters...of it as a ferric halloysite-type structure. Allophane could not be fit using paths based on Fe-substituted...particles suggest backscattering path lengths in allophane and hisingerite should be shortened compared to |  | | Journal (article/letter/editorial) | | to 45 −25 to 45 −10 to −5, 0 to 45 silicates allophane m Al2 O3• nSiO2• pH2 O montmorillonite m{Mg3 [Si4...magnesite (0.42–0.66 V, 7.5–13.3), duftite and allophane (0.42–0.86 V, 5.6–13.3), and montmorillonite (0...9.3–13.3). Notably, formation of duftite and allophane in the system does not depend on the total sulfide...5–40%); woodwardite, starkeyite, duftite, and allophane (0.58–1.15 V, 1.8–10.8); wroewolfeite and chalcantite...woodwardite, olivenite, scorodite, magnesite, or allophane exist, but alunogen is precipitated. Woodwardite |  | | Journal (article/letter/editorial) | | 322-329, 1998. WATER RETENTION BY COLLOIDAL ALLOPHANE AND IMOGOLITE WITH DIFFERENT CHARGES JUTARO KARUSE...Abstract-Water retention curves of colloidal allophane and imogolite with different charges and different...was found for the water retention of colloidal allophane even for particles of less than 50 nm in Stokes'...irreversible submicroscopic aggregation of allophane. Fresh allophane colloids with a low absolute net charge...structure. Allophane did not swell under ordinary conditions, but the relatively highly charged allophane recovered |  | | Journal (article/letter/editorial) | | This article was downloaded by: [New York University] On: 20 February 2015, At: 13:38 Publisher: Taylor...CHEMOGENIC-SEDIMENTARY ALUMINA ROCKS Downloaded by [New York University] at 13:38 20 February 2015 B.M. Mikhaylov...mainly of hydrated aluminum and silicon compounds (allophane and halloysite), gibbsite, aluminite, alumohydrocalcite...content (Table 1, specimen 2/2). Downloaded by [New York University] at 13:38 20 February 2015 called...Subsequently, it was found that the "bauxites" contained allophane, halloysite, gibbsite, and kaolinite [1, 12, 14] |  | | Journal (article/letter/editorial) | | when imogolite was mixed at a rate of 30% with allophane, the mixture behaved the same as imogolite, showing...solution to less than 1 mS/m. In order to remove allophane from the imogolite sam pie, the sampie was treated...waves for about ten minutes, then removing the allophane which was dispersed and separated from the ftocculated...Horikawa (1975a). Although the treatment for allophane removal was performed carefully, imogolite sam...pies still contained slight amounts of allophane. Pure allophane sam pies were obtained from the fresh |  | | Journal (article/letter/editorial) | | VOL 52, JANUARY_FEBRUARY' 1967 HIGH-ALUX,IINA ALLOPHANE AS A WEATHERING PRODUCT OF PLAGIOCLASE KBNNrru...er sity,l St anf ord', CaliJor ni a' Aesrnlcr Allophane ivith an exceptionally high content of alumina...secondary origin, and probable that development of allophane lepresents the first stage of weathering of the...formula quite distinct from that usually found for allophane. Pertinent chemicaland physical data are given...feldspar, t2/6; hornblende and biotite, 18/6. Allophane occurs most commonly at the cores of plagioclasecr1 |  | | Journal (article/letter/editorial) | | No. 4, 345-349, 1985. SIZE DISTRIBUTION OF ALLOPHANE UNIT PARTICLES IN AQUEOUS SUSPENSIONS p, L HALLl...Bag, Lower Hutt, New Zealand Abstract- The size distribution of unit particles of two New Zealand allophanes...significantly different, being 56 and 43 A for allophane-An and allophane-Rh, respectively. Consistent with this...surface area of allophane-Rh (897 m 2/ g) is appreciably greater than that of allophane-An (638 m 2/ g)...areas, derived from earlier studies. Key Words-Allophane, High-resolution transmission electron microscopy |  | | Book | | CA 95616, U.S.A. ELSEVIER Amsterdam -London -New York -Tokyo 1993 ELSEVIER SCIENCE PUBLISHERS B.V...Netherlands. Special regulations for readers in the USA -This publication bas been registered with the Copyright...made in the USA. All other copyright questions, including photocopying outside of the USA, should be referred...soils was established in Japan XI1 PREFACE and New Zealand several decades earlier. It was only in 1960...noncrystalline colloidal materials, such as imogolite, allophane, laminar opaline silica, ferrihydrite, and Al/Fe |
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