 | | Journal (article/letter/editorial) | | für Bodenkunde, D-85350 Freising-Weihenstephan, Germany (Received January 13, 2003; accepted in revised...be metastable with respect to fine-grained lepidocrocite; (2) requiring ferrihydrite to have entropy...well-crystalline iron oxides (hematite, goethite, lepidocrocite, maghemite) has been a subject of numerous studies...as adsorption and transport of metals from acid mine drainage waters (Jambor and Dutrizac, 1998). Ferrihydrite...with respect to lepidocrocite (␥-FeOOH), periclase (MgO), and ␣-MgSO4. Lepidocrocite was synthesized |  | Birch, William D., Pring, Allan, Reller, Armin, Schmalle, Helmut W. (1993) Bernalite, Fe(OH)3, a new mineral from Broken Hill, New South Wales: Description and structure. American Mineralogist, 78 (7-8) 827-834 | Journal (article/letter/editorial) | | 6 Martin-Luther-King Platz, 2000 Hamburg 13, Germany Hnlvrur W. ScnNr.qlr.n Institute of Inorganic...Bernalite is a new iron hydroxide from the Proprietary mine at Broken Hill, New South Wales, Australia. The...etermination was While visiting the Proprietary mine at Broken Hill, New undertaken to resolve fully...octahedralcrystalswas a new member of the the Proprietary mine at Broken Hill, New South Wales. INrnonucrrou 3/0708-08...recorded, so the exact occurrencein the Proprietary mine sequencecannot be established.However, the nature |  | Rakovan, John, Lüders, Volker, Massanek, Andreas, Nolze, Gert (2017) Gold Crystals from the Lena Goldfields, Bodaibo Area, Eastern Siberia, Russia: Exceptional Hoppered Octahedra and Pseudomorphs after Pyrite. Rocks & Minerals, 92 (5) 410-425 doi:10.1080/00357529.2017.1331396 | Journal (article/letter/editorial) | | GeoForschungsZentrum Section 3.2 Telegrafenberg 14473 Potsdam, Germany volue@gfz-potsdam.de ANDREAS MASSANEK Downloaded... Sammlungen Brennhausgasse 14 09599 Freiberg, Germany andreas.massanek@geosamm.tu-freiberg.de o ppered...Engineering Unter den Eichen 87 12205 Berlin, Germany gert.nolze@bam.de M INING FOR GOLD in the Bodaibo...extraction. Placer gold deposits in the Bodaibo region formerly represented the largest gold reserves...for Materials Research and Testing in Berlin, Germany. Figure 2 (below). Simplified geological map |  | | Journal (article/letter/editorial) | | resilication product in bauxite, Alabama Street Mine, Arkansas 139 SiO2/Al203 ratio, effect on surface...obituary 80 C Calcite ferrihydrite, goethite, lepidocrocite formed on, by reaction with Fe(C10,)2, Fe(C104)3...nontronite, deep-sea core, by XRF 375 olivine, Limberg, Germany 1 phillipsite, synthetic, Na, K content by electron...Chlorine FeC12 solution, oxidation to magnetite, lepidocrocite, akaganeite 167, 175 Chlorite authigenic, constraints...KELLER),Resilication of Bauxite at the Alabama Street Mine, Saline County, Arkansas, Illustrated by Scanning |  | Doornbusch, Brodie, Bunney, Karl, Gan, Bee K., Jones, Franca, Gräfe, Markus (2015) Iron oxide formation from FeCl2 solutions in the presence of uranyl (UO22+) cations and carbonate rich media. Geochimica et Cosmochimica Acta, 158. 22-47 doi:10.1016/j.gca.2015.02.038 | Journal (article/letter/editorial) | | 1978); Cl has also been shown to promote lepidocrocite formation (Schwertmann and Taylor, 1989). Uranium(VI)...Vertex 70 spectrometer (Bruker GmbH, Karlsruhe, Germany) using a KBr beam splitter, a deuterated L-alanine...Cosmochimica Acta 158 (2015) 22–47 Karlsruhe, Germany) diffractometer for DDI-H2O rinsed and HCl (0.1...analysis using Topas v.4.2 (Bruker GmbH, Karlsruhe, Germany). A brief description of the Rietveld method involving...339 1.408 1.440 1.494 1.516 1.335 Lepid. = lepidocrocite as c-FeOOH, unit cell parameters are listed |  | | Journal (article/letter/editorial) | | the longevity of limestone drains in treating acid mine drainage containing high concentrations of iron...drains are often implemented in the treatment of acid mine drainage (AMD), but when the AMD contains high levels...limestone grains. These coatings are composed of lepidocrocite/goethite in three distinct layers: an initial...Geochemistry 22 (2007) 2344–2361 1. Introduction Acid mine drainage (AMD) forms when sulphide minerals (e.g...choice worldwide for the neutralisation of acid mine drainage as it is cost-effective, widely available |  | Johnston, Scott G., Burton, Edward D., Keene, Annabelle F., Planer-Friedrich, Britta, Voegelin, Andreas, Blackford, Mark G., Lumpkin, Greg R. (2012) Arsenic mobilization and iron transformations during sulfidization of As(V)-bearing jarosite. Chemical Geology, 334. 9-24 doi:10.1016/j.chemgeo.2012.09.045 | Journal (article/letter/editorial) | | Britta Planer-Friedrich b, Andreas Voegelin c, Mark G. Blackford d, Greg R. Lumpkin d a Southern Cross...University, Universitatsstrasse 30, Bayreuth 95440, Germany Eawag, Swiss Federal Institute of Aquatic Science...(KFe3(SO4)2(OH)6) is an important host-phase for As in acid mine drainage (AMD) environments and coastal acid sulfate...rapidly (b1 h) transformed to a lepidocrocite intermediary. Although lepidocrocite efficiently adsorbed As(aq)...Fe(III)-mineral in coastal acid sulfate soils (CASS) and acid mine drainage (AMD) settings (Acero et al., 2006; Asta |  | | Journal (issue) | | barium pharmacosiderite, barite, carminite, lepidocrocite, parasymplesite, plumbogummite, rhodochrosite...stream sediment survey of the area around Carrock Mine (Appleton and Wadge, 1976) shows three, roughly...arsenopyrite with associated supergene minerals; lepidocrocite, scorodite and jarosite. Other veins in the...resembles the quartz in the tungsten veins at Carrock mine, being very coarse and greasy with few cavities...by thick selvages of cellular goethite and lepidocrocite that often carry epimorphs after a cubo-octahedral |  | | Book (edition) | | Mçnchen Institut fçr Bodenkunde 85354 Freising Germany & This book was carefully produced. Never- theless...Heppenheim Printed in the Federal Republic of Germany ISBN 3-527-30274-3 V Contents 1 Introduction...The oxide hydroxides 14 Goethite a-FeOOH 14 Lepidocrocite c-FeOOH 18 Akaganite b-FeOOH and schwertmannite...Cation substitution 39 General 39 Goethite and lepidocrocite 42 Al substitution 42 The Iron Oxides: Structure...character 69 Twinning 71 Effect of additives 73 Lepidocrocite 74 Akaganite and schwertmannite 75 Ferrihydrite |  | | Report (issue) | | from huge salt mines in Lower Silesia, Poland—a region which now has come up with two new occurrences...in 2016 in a disused tunnel of the Sieroszowice mine, and the Spirifer website, with typical conscientiousness... Ag, and Pt-group elements. In the Sieroszowice mine, which exploits both halite and Kupferschiefer,...crystals. Halite, 3.5 cm, from the Sieroszowice mine, Lubin district, Lower Silesia, Poland. Spirifer...======= Halite, 6.5 cm, from the Sieroszowice mine, Lubin district, Lower Silesia, Poland. Spirifer |  | | Journal (article/letter/editorial) | | No. 4, 409-415, 1994. THE TRANSFORMATION OF LEPIDOCROCITE DURING HEATING: A MAGNETIC AND SPECTROSCOPIC...the~ally mduced transformation of synthetic lepidocrocite (-y-FeOOH) to maghemite ('Y-Fe203)' Magnehc...breaking of OH bonds and the release of H 20 from lepidocrocite around 1750C can be explained by diffusive processes...dehydroxilation and the subsequent breakdown of the lepidocrocite structure was complete below 219OC. The comparison...IR spectra, Lepidocrocite, Maghemite, Phase transformation. INTRODUCTION Lepidocrocite (')'-FeOOH) is |  | Sahai, Nita, Lee, Young J., Xu, Huifang, Ciardelli, Mark, Gaillard, Jean-Francois (2007) Role of Fe(II) and phosphate in arsenic uptake by coprecipitation. Geochimica et Cosmochimica Acta, 71 (13) 3193-3210 doi:10.1016/j.gca.2007.04.008 | Journal (article/letter/editorial) | | Sahai a,b,c,* , Young J. Lee a,1, Huifang Xu a, Mark Ciardelli a, Jean-Francois Gaillard d a d Department...As(V) or As(III) + Fe(II) + HAP systems: (a) XANES region showing the presence of As(V) in the precipitates...lattice fringes at 0.61 nm indexed to (0 2 0) of lepidocrocite (c-FeIIIOOH) and the Fast Fourier Transform...Transform pattern (Fig. 6b) matches lepidocrocite. The identification was also consistent with the presence of...solubilities of bulk phases indicated that lepidocrocite (c-FeIIIOOH) or goethite (a-FeIIIOOH) should |  | | Journal (article/letter/editorial) | | Different colours in the upper part of the figure mark samples collected either from the peat surface (<33...fractions. † Sum fraction of ferrihydrite and lepidocrocite. ‡ R-factor = i (datai -fiti )2 / i data2i ...Normalized μ(E)x Fe(III)-citrate Ferrihydrite Lepidocrocite Chlorite Pyrite 7,050 7,200 E (eV) 7,350...Different colours in the upper part of the figure mark samples collected either from the peat surface (<33...transformations, and co-distribution with iron in a mine waste-influenced palustrine emergent wetland. Environ |  | | Journal (article/letter/editorial) | | Serbia; Chrysochroa buqueti, Thailand; cinnabar, Germany; Artacie haemoptera, Brazil; Markus Klein and Robert...photos. September/October: Silver crystals, Bachelor mine, Amethyst vein system, Mineral County, Colorado;...Colorado, 413; Nevada, 515 Annabergite, Kilometer 3 Mine, Laurium District, Greece, R. B. Cook, 154–59 Apatite...517 Connoisseur’s Choice, Annabergite, Kilometer 3 Mine, Laurium District, Greece, R. B. Cook, 154–59; Calaverite...Scorodite, Hezhou Prefecture, Guangxi Zhuang Autonomous Region, China, R. B. Cook, 242–48; Spessartine, Marienfluss |  | Voegelin, Andreas, Kaegi, Ralf, Frommer, Jakob, Vantelon, Delphine, Hug, Stephan J. (2010) Effect of phosphate, silicate, and Ca on Fe(III)-precipitates formed in aerated Fe(II)- and As(III)-containing water studied by X-ray absorption spectroscopy. Geochimica et Cosmochimica Acta, 74 (1) 164-186 doi:10.1016/j.gca.2009.09.020 | Journal (article/letter/editorial) | | the absence of phosphate at low Si/Fe ratio, lepidocrocite (Lp) forms. In solutions containing sufficient...Fe(II) oxidation at near-neutral pH results in lepidocrocite (Lp) formation. The presence of oxyanions like...As sequestration from hydrothermal waters, acid mine drainage, and mining wastes (Rancourt et al., 2001;...(crystalline, short-range ordered, adsorbed) 2.2.1. Lepidocrocite, goethite, 2-line ferrihydrite, and silicate-rich...silicate-rich hydrous ferric oxide Lepidocrocite (“Lp”) was synthesized by aerating a 0.2 M FeCl24H2O dissolved |  | | Journal (article/letter/editorial) | | the river Mulde near Muldenstein (Saxony-Anhalt, Germany). It is subject to occasional flooding (Brandt,...The ongoing erosion and weathering of mine tailings and acid mine drainage still lead to substantial particulate...sections (Labor Beckmann, Schwülper-Lagesbüttel, Germany). Due to the lower organic carbon content of the...(Schwertmann and Cornell, 1991). Synthetic lepidocrocite was kindly provided by Paul Borer, ETH Zurich...the Angströmquelle Karlsruhe (ANKA, Karlsruhe, Germany). The ring was operated at 2.5 GeV with a beam |  | Pršek, Jaroslav, Dumańska-Słowik, Magdalena, Powolny, Tomasz, Natkaniec-Nowak, Lucyna, Toboła, Tomasz, Zych, Damian, Skrepnicka, Dominika (2020) Agates from Western Atlas (Morocco)—Constraints from Mineralogical and Microtextural Characteristics. Minerals, 10 (2) 198 doi:10.3390/min10020198 | Journal (article/letter/editorial) | | Middle Atlas Mts. (e.g., Kerrouchen and Ahouli region). Agate mineralization is pervasively accompanied...constraints on formation conditions of agates from this region and determine the possible sources of silica-bearing...basaltoides have a thickness up to 3.0 km in that region [15]. This volcanic outcropping is half-moon shaped...focusing on agate the studied agate (rectangles mark areas of study in Agouim and well as Kerrouchen...Kerrouchen in Khenifra). occurrences (rectangles mark areas of study in Agouim and well as Kerrouchen in Khenifra) |  | | Journal (article/letter/editorial) | | nanoparticles are ubiquitous in soils, sediments and mine wastes, and are also used in nanotechnological applications...typically used for magnetite synthesis, goethite or lepidocrocite appeared in addition to magnetite (Fig. 1)....precipitation lepidocrocite was present. However, after 3 days the amount of lepidocrocite started to decrease...other iron oxides such as goethite, akaganeite, lepidocrocite or hematite. Because there were no extra Bragg-reflections...maghemite and goethite magnetite/ maghemite and lepidocrocite magnetite/ maghemite magnetite magnetite magnetite |  | Nabatian, Ghasem, Ghaderi, Majid, Corfu, Fernando, Neubauer, Franz, Bernroider, Manfred, Prokofiev, Vsevolod, Honarmand, Maryam (2014) Geology, alteration, age, and origin of iron oxide–apatite deposits in Upper Eocene quartz monzonite, Zanjan district, NW Iran. Mineralium Deposita, 49 (2) 217-234 doi:10.1007/s00126-013-0484-1 | Journal (article/letter/editorial) | | pyrite are generally altered to goethite and lepidocrocite. Most of the Morvarid and Zaker ore bodies are...probably during surface weathering. Goethite and lepidocrocite are secondary minerals after magnetite, and...(Fig. 13 e). Additionally, hematite, goethite, lepidocrocite, malachite, and azurite are supergene and weathering...and one of the largest deposits, is in the Kiruna region of northern Sweden (Frietsch 1978; Frietsch and...et al. 2010; Bonyadi et al. 2011); in the Avnik region of southeastern Turkey (Helvaci 1984); in the Circum-Pacific |  | | Book | | found in nature are listed generally either as a region or a country. To find specific localities, other...If the dust can be removed revealing no scratch mark, the test mineral is softer than the unknown mineral...are set for testing scratch hardness. If a scratch mark is revealed, the test mineral is harder. If no clear...gypsum, halite, calcite. Found in : Lower Saxony/Germany; Czechoslovakia; Yugoslavia; Surrey/England; Colorado/USA;...by: ordinary coal. Found in: Thuringia, Saxony/Germany; Czechoslovakia; Seine/France, Tula/ USSR. Similar | | | Book | | found in nature are listed generally either as a region or a country. To find specific localities, other...If the dust can be removed revealing no scratch mark, the test mineral is softer than the un known mineral...are set for testing scratch hardness. If a scratch mark is revealed , the test mineral is harder. If no...gypsum, halite, calcite. Found in: Lower Saxony/Germany; Czechoslovakia; Yugoslavia ; Surrey/England; Colorado/USA;...by: ordinary coal. Found in: Thuringia, Saxony/Germany; Czechoslovakia; Seine/France, Tula/ USSR. Similar |  | Zachara, John M., Kukkadapu, Ravi K., Peretyazhko, Tanya, Bowden, Mark, Wang, Chongmin, Kennedy, Dave W., Moore, Dean, Arey, Bruce (2011) The mineralogic transformation of ferrihydrite induced by heterogeneous reaction with bioreduced anthraquinone disulfonate (AQDS) and the role of phosphate. Geochimica et Cosmochimica Acta, 75 (21) 6330-6349 doi:10.1016/j.gca.2011.06.030 | Journal (article/letter/editorial) | | Zachara ⇑, Ravi K. Kukkadapu, Tanya Peretyazhko, Mark Bowden, Chongmin Wang, Dave W. Kennedy, Dean Moore...occurring thereafter. The product suite included lepidocrocite, goethite, and/or magnetite, with proportions...reductant:oxidant ratio (r:o) and the presence of P or C. Lepidocrocite was the primary product at low r:o in the absence...higher r:o in the absence and presence of P. Lepidocrocite was the primary mineralization product in the...based on total Fe(III) mass: ferrihydrite lepidocrocite > nanocrystalline Fe(III) oxides > Fe(III) containing | | | Book | | photos of minerals— listed generally either as a region or a corresponds to the group of minerals dis-...will remain on the surface of the If a scratch mark is revealed, the test min- unknown mineral. This...have the same hardness, a revealing no scratch mark, the test min- magnifying glass might help decide...gypsum, halite, calcite. Found in: Lower Saxony/Germany; Czechoslovakia; Yugoslavia; Surrey/England; 6*...by: ordinary coal. Found in: Thuringia, Saxony/Germany; Czechoslovakia; Seine/France, Tula/ USSR. Similar |  | | Report (issue) | | Copperside mine, Goodsprings, Nevada ............................................ New Mayberry mine, Utah.................................. Hidden Treasure mine, Ophir Hill area, Utah ...........................32 A case study of porosity at the Shingle Canyon mine, New Mexico 33 Sulfide estimates by ordinary porosity...Pewabic mine, Hanover, New Mexico ................................................ Grant County mine, New...Bullfrog mine, Vanadium, New Mexico .............................................. Anita mine, New Mexico |  | | Journal (article/letter/editorial) | | precipitates are comprised mainly of ferrihydrite, lepidocrocite and an organic-Fe species, while precipitate...streamwater and benthic geochemistry. The Fiordland region of New Zealand is a heavily glaciated alpine landscape...topography (Korup, 2005b). Valley floors in this region are heavily forested with cool temperate rainforest...800–1000 m elevation. Stream and lake waters in the region are oligotrophic and highly pristine by world standards...2013). Aquatic geochemistry studies within this region are relatively few and none have examined the potential |
|
