 | | Journal (issue) | | Articles The Val Graveglia m anganese district, Liguria, I t a ly .......................................Donato, Italy macco.marchesini@agip.it Renato Pagano Casella Postale 37 1-20092 Cinisello, Italy renpagan@tin... Figure 1. The Val Graveglia area, Genoa Province, Northern Italy. 1— Cassagna mine 2—Gambatesa mine...manganese district of Val Graveglia in northern Italy produced over one million tons of high-grade ore...coastal region of the Tyrrenian Sea is called Liguria: the name is from an ancient people known as the |  | | Journal (article/letter/editorial) | | metamorphism of ophiolitic metabasic rocks from E. Liguria, Italy. E. T. C. SPOIXER, H. J. CHAPMANand J. 0. SMEWING:Strontium...O,CaO change during spilitisation A120,/Si02. allophane AI&b,. garnet equilibria alteration, cheintcal...fluortte .., Ca activity. sptlitic aiteration. Ca allophane Cacoal. ,‘_:::I_’ Ca coprecipitation of Na and...Precambrian clasts. Sudbury Breccia . , . clay. allophane . . . . . clay dissolution kinetics, _ . ‘ clay...341 493 1231 L693 1627 1419 1539 age East Liguria. Italy: ophioiite : East Pacific Rise. metalliferous |  | | Journal (article/letter/editorial) | | different explanations, including association with allophane, or more generally, following weathering of volcanic...capacities. KEYWORDS: spheroidal halloysite, allophane, iron content, microbes, organic matter, volcanic...supersaturated solution. The association of SPH with allophane, the Fe in its structure, specific physical environments...from Opotiki in New Zealand, showing probable allophane on the surface of SPH; scalebar = 0.1 µm (from...referred largely to the presence or absence of allophane as the precursor of SPH (Sudo & Takahashi, 1955; |  | | Journal (article/letter/editorial) | | Komadel, Jana Madejova  and Juraj Bujda  k. allophane determined by Preparation and properties of reduced-charge...Emidio Tertulliano Lopes da with a high-silica allophane Silva. Kaolin deposits from the northern sector... the island of Angola) Lipari Christian (Italy) Tomas Grygar, Michaela Jaroslav Petr Bezdic...Weches Formation, Claiborne Group, Middle Eocene, NE Texas Wada. glass Robert J.M. Huggett, D.K. McCarty |  | | Catalog/List | | RI C:HARD BYw·AYS TAYLER ,~I 'NE R AL S 2 0 BURS T EAD CL OS E ·COBHAM S URRE Y E N GL AND K T 1 1...of Norway) lx2 90p 2x2 ll,80 2x4 t3.70 218 ALMAND!NE with 0~phacit2. 1 to 2 mmrer1 ~lmandine in Ed,:,gj_teroe:'...fi1icaeousscales on matrix a (St M~rcel, Val d'Aosta Italy) W 1J:1 7Cp 1x2 f 1. 30 2x2 :t3. 00 brc~n ~~ss...crystals in cavities in Slag.Cetine Mine, Sienna ,Italy .. lem t3.80 88 CHABAZITE white crystais on Basalt...thin white crust on 1cmmatrix.(Mt Amiata Tuscany Italy) f,1.20 123 DIDPSIDE pale fawn massive with possible |  | | Journal (article/letter/editorial) | | pages379-390, 1976 Morphologyandcompositionof allophane Tsnuo HnNurleNn Ko:r Wnnt Facultyof Agriculture...fluorescencespectroscopy.In electron micrographs, allophane appeared as fine, ring-shaped particles with diameters35-50...analysis of the fine clays ((0.2 pm) showed that allophane has a SiOz/ALOs ratio (mole) ranging at least...imogolite has a SiOr/AlzOs ratio close to 1.0. Allophane-like constituentsdissolvedby dithionite-citrateand...remaining allophane. Electron micrographs of the coarse clays (0.2-2 prm) showed that allophane forms within |  | | Journal (article/letter/editorial) | | and particle size. Thus, the surface area of allophane, a soil clay comprising 3.5–5.0 nm spheroidal...nanoparticles, colloid, soil, clay minerals, allophane, imogolite, nanoparticles towards external metal...were commonly referred to as “fi ne-grained”, “submicron”, or “ultrafi ne”. The prefi x “nano” (as in nanocomposite...the transport of minerals of short-range order (allophane, imogolite, nutrients, pollutants, organics, heavy...metal (hydr)oxides, and humic substances, while allophane and imogolite are abundant in volcanic soils. |  | | Journal (article/letter/editorial) | | THE ELECTROPHORETIC MOBILITY OF IMOGOLITE A N D ALLOPHANE IN THE PRESENCE OF INORGANIC ANIONS A N D CITRATE*...inorganic anions and citrate with imogolite and allophane using electrophoresis. The electrophoretic mobility...highest point of zero charge (PZC) values for allophane occurred in the presence of C104, NO3, Br, I,...than the other ions. The EM of imogolite and allophane was negative at pH < 6 in 0.001 and 0.01 M NaF...the PZC and the EM in allophane compared with C104. Phosphate-treated allophane had the same PZC as a |  | | Journal (article/letter/editorial) | | quartzites from the eastern cover of the ulová pluton (NE Bohemian Massif) Jacek Puziewicz, Wrocaw, Kamilla...quartzites from the eastern cover of the ulová pluton (NE Bohemian Massif). – N. Jb. Miner. Abh. (178): 153... titanite, graphite and optically isotropic “allophane” representing chemically a mixture of silica,...basement of the Brunia microcontinent. The resulting NE – SW trending orogenic zone consists of W-dipping...methods. Chemical compositions of minerals and “allophane” were analysed by the CAMECA SX50 microprobe at |  | | Report (issue) | | ......................................... 14 Allophane ................................................which they have been found. Clay minerals (except allophane and halloysite), soils, detrital minerals, and...DESCRIPTION OF INDIVIDUAL MINERALS ALLOPHANE xAl2 O3 ?ySiO2 ?zH2 O Although allophane is not uncommon, few occurrences...Tippe canoe County, found a coarse, greenish-blue allophane associated with other silicious deposits there...Thompson. He also mentioned (1889, p. 38) that allophane occurs in the glacial materials associated with |  | | 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 |  | Fuchs, Marco, Abidin, Zaenal, Kübel, Christian, Weidler, Peter G., Matsue, Naoto, Henmi, Teruo, Köster, Rainer, Gliemann, Hartmut (2012) Patterned Deposition of Allophane Nanoparticles on Silicon Substrates. Clays and Clay Minerals, 60 (5) 456-463 doi:10.1346/ccmn.2012.0600502 | Journal (article/letter/editorial) | | No. 5, 456–463, 2012. PATTERNED DEPOSITION OF ALLOPHANE NANOPARTICLES ON SILICON SUBSTRATES M A R C O...order to obtain nanopatterned surfaces, natural allophane particles originating from Japanese soils were...allophanes on the substrate. The amount of immobilized allophane was increased significantly, however, by using...with a micelle-based technique to suspend the allophane particles. The micelles were formed from a tailored...was dissolved in toluene and contained several allophane particles. A cleaned silica chip was used as a |  | Kaufhold, Stephan, Kaufhold, Annette, Jahn, Reinhold, Brito, Salomón, Dohrmann, Reiner, Hoffmann, Rainer, Gliemann, Hartmut, Weidler, Peter, Frechen, Manfred (2009) A New Massive Deposit of Allophane Raw Material in Ecuador. Clays and Clay Minerals, 57 (1) 72-81 doi:10.1346/ccmn.2009.0570107 | Journal (article/letter/editorial) | | No. 1, 72–81, 2009. A NEW MASSIVE DEPOSIT OF ALLOPHANE RAW MATERIAL IN ECUADOR S T E PH A N K A UF H...OL D J AH N 2 , S A L OM Ó N B RI T O 3 , R E I NE R D O H RM A N N 1 , 4 , R A IN E R H O FF M A NN...and Natural Resources have discovered a huge allophane deposit covering an area of >4000 km2. This study...the mineralogical composition, an allophane-rich layer (allophane facies) could be distinguished from...the dominance of allophane over imogolite in the allophane facies. Single allophane particles were investigated |  | | Journal (article/letter/editorial) | | 1,64-69, 1999. FIVE-COORDINATE ALUMINUM IN ALLOPHANE CYRIL I W, CHILDS, I SHIGENOBU HA Y ASHI 2 AND...New Zealand Abstract-Samples of Silica Springs allophane from Tongariro National Park, New Zealand, having...observed far 5-coordinate AI in Silica Springs allophane is 36 :':: I ppm. which is consistent with shifts...suggest that 5-coordination in Silica Springs allophane is associated with the edges of fragments of incomplete...tetrahedral sheets in the primary partic1es of this allophane. Other allophanes with AI/Si< 2, and which are |  | | Journal (article/letter/editorial) | | absorption line width of wideJine NMR with water in allophane,is 0.12 gauss3ll-"r, and expands to 0.8 gauss...at 110"C. The infrared absorption spectrum of allophane shows a broad atrsorption band near 8480 or B4gocm-r...associated with o-rr stretching vibration. Protons in allophane are almost completely exchanged by deuterons,...releasedfrom allophane by fluoride. These results suggest for the properiies of the water in allophane: comparatively...montrnorillonite, molecular sieve, and two of allophane were used. Kaolinite was frorn Kaolin Dry Branch |  | | Journal (article/letter/editorial) | | HEMNI Ehime University, Matsuyama, Japan Abstract-Allophane samples from soils, pumice, and stream beds have...chromatography, and .,phosphate adsorption methods. The allophane particles were hollow spherules or polyhedra 35..."proto-imogolite" allophane . Two soil allophanes had a similar structure to the allophane from Stratford...infrared bands at 470, 1030, and 1100 cm- I . The allophane from the stream bed at Silica Springs had an infrared...not have the imogolite structure. Key Words--Allophane, Crystal structure, Imogolite, Infrared spectroscopy |  | 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) | | increasing soil age; its growth is at the expense of allophane, which, in turn, forms at the expense of primary...released Al by the halloysite-precursor mineral allophane. The d18O relationship between present-day soil...stable. Over the time span of our chronosequence, allophane has been produced continuously as plagioclase...support relative stability of halloysite over allophane. Si concentration levels are higher in the top...or forming allophane as it weathers from primary minerals. Figure 2 shows that allophane is present in |  | | Report (issue) | | Indianaite is a rock term for halloysite- ( 1OA) and allophane-rich clays that generally occur as layered, bedding-parallel...purplish brown mudrock containing halloysite ± allophane ± kaolinite ± gibbsite ± quartz± Al, Ca, Fe sulfates...Crushed Stone Company quarry is located in the SW¼ NE¼ section 34, T. 9 N., R 2 W., Monroe County, Indiana...stratigraphic interval at the Sieboldt Quarry located in the NE¼ SE¼ section 11, T. 6 N., R 2 W., Lawrence County...kaolinite/ halloysite (7 A), halloysite (l0A), allophane, and small amounts of gibbsite, smectite, and |  | Berthonneau, Jeremie, Grauby, Olivier, Jeannin, Charlotte, Chaudanson, Damien, Joussein, Emmanuel, Baronnet, Alain (2015) Native Morphology of Hydrated Spheroidal Halloysite Observed by Environmental Transmission Electron Microscopy. Clays and Clay Minerals, 63 (5) 368-377 doi:10.1346/ccmn.2015.0630503 | Journal (article/letter/editorial) | | A N UE L J O U S SE I N 3 A N D A L AI N B AR O N NE T 1 2 1 Aix Marseille Université, CNRS, CINaM UMR...dissolution-crystallization sequence consisting of volcanic ash allophane 10 Å halloysite 7 Å halloysite–kaolinite was...surrounded by fragments of spheroid caps immersed in allophane (left-hand side). (d) (001) lattice fringes from...dissolution-crystallization sequence: volcanic ash allophane 10 Å halloysite 7 Å halloysite kaolinite is...caps resembling turtle shells and immersed in an allophane assemblage of nano spherules (Figure 6c). This |  | | Report (issue) | | microscopic threadlike particles, and bundles of ¯ne tubes, each about 20 º A in diameter. Physical Properties:...soils derived from volcanic ash. Association: Allophane, quartz, cristobalite, gibbsite, vermiculite,...References: (1) Yoshinaga, N. and S. Aomine (1962) Allophane in some Ando soils. Soil Sci. and Plant Nutrition... and K. Wada (1977) Density and structure of allophane. Clay Minerals, 12, 289{298. (6) Goodman, B.A |  | | Journal (article/letter/editorial) | | evaluate the role of petrographically-identified allophane in the alteration process. Replicas of fresh,...quartz, and pyrite Recrystallized biotite Allo = allophane-hisingerite, cal = calcite, chi = chlorite, ep...is variable, ranging from about 1·50, when the allophane is broken, to nearly 1·52, rarely to I· 56, upon...slightly higher than that of reported values of allophane, and the color changes lead Sales and Meyer to...hisingerite is probably present in the dominant allophane, the iron apparently coming from alteration of |  | Philippo, Simon, Blondieau, Michel, Puccio, Stéphane, Hatert, Frédéric, Bruni, Yannick (2019) Minéralogie de la commune de Visé (Argenteau, Richelle et Visé), Province de Liège, Belgique. Ferrantia 81. Musée national d'histoire naturelle | Journal (issue) | | dans les poches de dissolution des calcaires Allophane Alumohydrocalcite Calcite Cuivre natif, Cu, azurite...data, as ell as on ne analyses performed on recently-collected material. hirteen ne minerals ere found...Cheratte (ancienne mine de charbon), Lanaye et Lixhe, ne sont pas envisagés dans ce travail. Contexte géologique...halotrichite est un minéral soluble dans l'eau qui ne s'observe pas à l'affleurement. Par contre, en collection...Près des parois, argile aun tre strati ée et allophane en bleu sur le schéma Le point rouge indique l'endroit |  | | Journal (article/letter/editorial) | | AI2-4Si20s(OH)n' mH 20 and noncrystalline diffraction for allophane. The species are also distinguished by their distinctive...and minute spheres about 50 A in diameter for allophane. Spherules with kaolinite composition and 7-A...30 35 28 33 32 44 43 43 0 Infrared spectroscopy Ne 208 Mean diameter of spherules vs. run time. I...5 3 3 4 73 80 100 100 100 100 100 3 100 3 100 3 Ne = noncrystalline aluminosilicate; K = kaolinite;...distinction among kaolinite, halloysite, and allophane is often made on the basis of their morphologies |  | | Report (issue) | | are minor amounts of halloysite and some allophane or allophane-evansite. The clay fraction of the highly...ings B Sands tone at Portal of North Gardn e r Mi ne Mansfield Sandstone PLATE 3 A Thin -bedded and...a thin layer of shale l ying between the limesto ne and the sandstone. In both Lawrence and Monroe counties...sandstone roof and contains irregular areas of allophane-evansite and a few endellite nodules. The lower...initial material was deposited. The nodules and the allophane masses and veins are late phases in the mineralization |  | Rennert, Thilo, Eusterhues, Karin, Hiradate, Syuntaro, Breitzke, Hergen, Buntkowsky, Gerd, Totsche, Kai U., Mansfeldt, Tim (2014) Characterisation of Andosols from Laacher See tephra by wet-chemical and spectroscopic techniques (FTIR, 27Al-, 29Si-NMR) Chemical Geology, 363. 13-21 doi:10.1016/j.chemgeo.2013.10.029 | Journal (article/letter/editorial) | | Editor: Carla M. Koretsky Keywords: Andosols Allophane 29 Si- and 27Al-NMR spectroscopy Extraction a...formation of poorly crystalline minerals such as allophane, imogolite and ferrihydrite. Detection of these...weathering intensities correlate with the amounts of allophane. © 2013 Elsevier B.V. All rights reserved. 1...minerals such as allophane, imogolite and ferrihydrite (Dahlgren et al., 2004). Allophane is a shortrange...rapid weathering of volcanic glasses. Generally, allophane is formed at pH N 4.7 in drained soils with an |
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Monte Copello-Reppia mine, Reppia, Ne, Genoa, Liguria, Italy