 | | Book | | immensely popular handbook of minerals appeared in Germany I obtained a copy fo! my personal library and was...times, and there is evidence of at least one flint mine dating from this period. Finely worked and polished...fibrous sphalerite from Diepenlinchen, near Aachen, Germany. PLATE Vo I~ .·• / ~1 rhyolite 37 r . ...chalcopyrite from Herdorf, Siegerland, Germany. Center. Pyrrhotite. Harzburg, Germany. Below Massive chakopyrite...strongly tarnished, showin,z bright iridescence. Herdorf, Siegerland. 38 TABLE 5 The principal igneous |  | | Book | | Netherlands. Back cover The museum ldar-Oberstein. West-Germany. is quaintly situated beneath the Felsenkirche...Copyright 1986 by . Ulrich Burchard, Lalling, West-Germany All rights reserved including the right of reproduction...Printed in Germany Miscellaneous: Design & Lay Out by Rainer Bode, Haltern, West-Germany Type set by...Wurzburg, West-Germany Colour separations by Litho Thungen GmbH, Thungen, West-Germany H. Bari, Musee...Printed by Sellier Druck GmbH, Freising, West-Germany 6 Gasull, Museo de Geologia, Barcelona 249; V |  | | Journal (article/letter/editorial) | | BayCEER, University of Bayreuth, D-95440, Bayreuth, Germany 2 Biological and Environmental Sciences, Faculty...leading to As(III)-enriched precipitates around acid mine drainage environments that may become exposed to...generated lepidocrocite and goethite at pH 6 and 6.9 in the presence of 1 mM Fe(II) aq. Lepidocrocite was found...Fe(II)aq. Keywords- schwertmannite, acid mine drainage, lepidocrocite, goethite, arsenic, Fe(II) catalyzed...SO42- and Fe3+-enriched acidic water around acid mine drainage (AMD) localities (Bigham et al., 1990, |  | 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...for Materials Research and Testing in Berlin, Germany. Figure 2 (below). Simplified geological map...could be collected from the ground like mushrooms (Wolf 2016). However, at that time it was strictly forbidden |  | Poggenburg, Christine, Mikutta, Robert, Schippers, Axel, Dohrmann, Reiner, Guggenberger, Georg (2018) Impact of natural organic matter coatings on the microbial reduction of iron oxides. Geochimica et Cosmochimica Acta, 224. 223-248 doi:10.1016/j.gca.2018.01.004 | Journal (article/letter/editorial) | | Hannover, Herrenhäuser Straße 2, 30419 Hannover, Germany 2 Centre for Solid State Chemistry and New Materials...University Hannover, Callinstraße 3, 30167 Hannover, Germany 3 Soil Science and Soil Protection, Martin Luther...Von-Seckendorff-Platz 3, 06210 Halle (Saale), Germany 4 Bundesanstalt für Geowissenschaften und Rohstoffe...Rohstoffe (BGR), Stilleweg 2, 30655 Hannover, Germany 5 Landesamt für Bergbau, Energie und Geologie (LBEG)...(LBEG), Stilleweg 2, 30655 Hannover, Germany *Corresponding author: poggenburg@ifbk.uni-hannover.de, +49 |  | | Journal (article/letter/editorial) | | wto/oCl) and goethite, with minor amounts of lepidocrocite and maghemite.Cl is not native to the meteoritesbut...Generalformula Formula wt% Fe Akagan6ite Goethite Lepidocrocite Maghemite hollandite diaspore boehmite cubic...are intermediate between those ofgoethite and lepidocrocite, appearingsubdued like a coke fire in a fireplace...swithin the meteorite. Akagan6ite,goethite,lepidocrocite,and maghemite are ing of an extended crack,...generalformula. Also given is the for- in goethite and lepidocrocite. Cl is apparently absent in mula weight percent |  | | 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 |  | Cairncross, Bruce, Windisch, Wolfgang, Smit, Henk, Fraser, Allan, Gutzmer, Jens (2008) The Vergenoeg: Gauteng Province, South Africa Fluorite Mine. Rocks & Minerals, 83 (5) 410-421 doi:10.3200/rmin.83.5.410-421 | Journal (article/letter/editorial) | | PROVINCE, SOUTH AFRICA T FLUORITE MINE he Vergenoeg fluorite mine is located in the Gauteng Province...approximately 80 kilometers northeast of Pretoria. The mine is somewhat of an anomaly regarding the production...koechlinite has been discovered. In addition, the mine has produced spectacular botryoidal and stalactitic...Afrikaans, meaning “far enough.” The Vergenoeg fluorite mine is located approximately 140 kilometers northeast...northeast of Johannesburg, South Africa. Access to the mine is easy via a paved road that leads off from the |  | | Journal (article/letter/editorial) | | [α-FeOOH] [5,8], akaganeite [β-FeO(OH,Cl)] [9,10], lepidocrocite [γ-FeOOH] [11], jarosite [(K,Na,H3 O)Fe3 (OH)6...Advance diffractometer (Bruker AXS, Karlsruhe, Germany) equipped with a Cu Kα source and a position sensitive...Diffrac.Eva version 4.0 (Bruker AXS, Karlsruhe, Germany) was used for mineral identification, and the Profex...characterization. Mineral codes: G = Goethite, L = Lepidocrocite, M = Magnetite, GR = Green Rust, S= Schwertmannite...that started at pH 7 produced a mixture of lepidocrocite, nanocrystalline goethite, and nonstoichiometric |  | | Report (issue) | | somewhat similar to the magnetic ores of the Running Wolf district. The development work on them, however...detail. 3. IRON MINES PARK The Iron Mountain mine, consisting of some ten claims owned by Mr. Dewey...banded ore from the Le Roi claim in the Running Wolf district. Some of the specimens are finely granular...fine-grained magnetite and hematite, a little lepidocrocite and later limonite. Some of the platy hematite...fine-grained magnetite with some granular hematite, lepidocrocite, and later limonite, and a few sheaves of platy |  | | Journal (article/letter/editorial) | | The TEM-SAED results reveal that nanoscale lepidocrocite and goethite formed at ferrihydrite surfaces...structural incorporation into neoformed goethite and lepidocrocite. Our results improve the understanding of Mo(VI)...KEYWORDS: molybdenum, ferrihydrite, bamfordite, lepidocrocite, goethite ■ for many biological systems.15...precipitation of more crystalline phases, including lepidocrocite and goethite, with reaction pathways depending...plastic syringes (Norm-Ject, Henke-Sass Wolf, GmbH, Germany), passed through 0.1 μM PES syringe filters |  | 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) | | 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...(DIFFRAC-plus evaluation package, Bruker AXS, Karlsruhe, Germany). 2.6. Electron microscopy The morphology of selected |  | Schoepfer, Valerie A., Qin, Kaixuan, Robertson, Jared M., Das, Soumya, Lindsay, Matthew B. J. (2020) Structural Incorporation of Sorbed Molybdate during Iron(II)-Induced Transformation of Ferrihydrite and Goethite under Advective Flow Conditions. ACS Earth and Space Chemistry, 4 (7) 1114-1126 doi:10.1021/acsearthspacechem.0c00099 | Journal (article/letter/editorial) | | goethite; ferrous iron; recrystallization; lepidocrocite 1 ACS Paragon Plus Environment ACS Earth and...transformation of both ferrihydrite and goethite to lepidocrocite. Additionally, Fe(II) introduction mobilized...thermodynamically through metastable to more lepidocrocite crystalline phases [γ‑FeOOH], and including...to mimic concentrations previously reported for mine waters,7 while also minimizing potential for the...polyethylene syringes (Norm-Ject®, Henke-Sass, Wolf GmbH, Germany). Measurements of pH and redox podential |  | | 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 |  | | Journal (article/letter/editorial) | | accessory hematite (a-Fe2O3) and some minor lepidocrocite (c-FeOOH). No other minerals are detectable...presented elsewhere (e.g., Lippolt et al., 1998; Wolf et al., 1998; Shuster and Farley, 2004, 2005; Shuster...age equation can be expressed as follows (e.g., Wolf et al., 1998). t0 8½238 Uk ½4 He 232 Thk...less than 0.5% of that produced by decay of 238U (Wolf et al., 1998). Thus, to a first approximation, the...G = goethite peaks. H = hematite peaks. L = lepidocrocite peaks. Goethite is the dominant mineral in the |  | | Journal (article/letter/editorial) | | Arsenic in Soils, Mine Tailings, and Former Industrial Sites Guillaume Morin and Georges Calas1 M SEM...micrograph of sediments from the Carnoulès (France) acid mine drainage site, showing amorphous As5+–Fe3+ hydrous...biogeoKEYWORDS: arsenic, contamination, soils, acid mine drainage, speciation chemical properties is emerging...conINTRODUCTION taminated soils, former industrial sites, and mine tailings. Although arsenic occurs naturally in soils...The investigation of As-impacted soils and acid mine drainages, using synchrotron-based techniques, shows |  | | Journal (article/letter/editorial) | | www.elsevier.com/locate/gca Sulfidization of lepidocrocite and its effect on uranium phase distribution...state of uranium in batch experiments, in which lepidocrocite with adsorbed U(VI) was reacted with sulfide...by the exchange of hydroxide groups at the lepidocrocite surface by thiol groups which have a lower tendency...sulfide addition, indicating that the product of lepidocrocite sulfidization has a lower affinity for uranium...This would imply that the fast reaction of lepidocrocite with sulfide outcompetes reduction of U(VI) and |  | | Journal (article/letter/editorial) | | poorly ordered ferrihydrite and lepidocrocite. Morphologies of lepidocrocite (lath-type) and presumably of...they can deposit ( BELZILE et al., 1989). Lepidocrocite, goethite, and fenihydrite were synthesized...diffractometer, CoKa radiation, or Gandolfi camera). Lepidocrocite was obtained by aging for six days; the precipitate...ammonium hydroxide. The XRD reflections of lepidocrocite were sharper when the second method was used...dissolve completely laboratory prepared goethite, lepidocrocite, and fenihydrite, when employed as suggested |  | | Journal (article/letter/editorial) | | ganéite and goethite with smaller volumes of lepidocrocite and maghemite. Zolensky and Gooding (1986) reported...akaganéite 0.5 to 19 wt.%, goethite 1 to 8 wt.%, lepidocrocite 0.5 to 11 wt.% and maghemite 0.4 to 7 wt.%....terrestrial weathering products in the ‘hot’ desert Wolf Creek iron meteorite had lower concentrations of...(Buchwald and Koch, 1995). By contrast, goethite, lepidocrocite and maghemite in Antarctic meteorites contain...concentration of 2 wt.% Si in Fe-oxyhydroxides from mine drainage-contaminated groundwater and Hochella et |  | Johnston, Scott G., Keene, Annabelle F., Bush, Richard T., Burton, Edward D., Sullivan, Leigh A., Isaacson, Lloyd, McElnea, Angus E., Ahern, Col R., Smith, C. Douglas, Powell, Bernard (2011) Iron geochemical zonation in a tidally inundated acid sulfate soil wetland. Chemical Geology, 280 (3) 257-270 doi:10.1016/j.chemgeo.2010.11.014 | Journal (article/letter/editorial) | | low pH (3–4). This was followed by increasing lepidocrocite (γ-FeOOH) and goethite (α-FeOOH) at circumneutral...leaches more crystalline forms of Fe including lepidocrocite and goethite (Kostka and Luther, 1994; Raiswell...(DIFFRAC-plus evaluation package, Bruker AXS, Karlsruhe, Germany). 2.5. Porewater sampling and analysis Porewater...lowerintertidal zone, including ferrihydrite, lepidocrocite, goethite and schwertmannite (Fig. 11c). In...diffraction patterns identify goethite and lepidocrocite as the dominant Fe(III) mineral phases, with |  | | Journal (article/letter/editorial) | | precipitates are comprised mainly of ferrihydrite, lepidocrocite and an organic-Fe species, while precipitate...(DIFFRAC-plus evaluation package, Bruker AXS, Karlsruhe, Germany). 3.5. Electron microscopy Selected iron precipitate...used in LCF include synthetic ferrihydrite, lepidocrocite, goethite and hematite that were prepared as...EXAFS fit over k-range 2–10. Sample EXAFS (%) Lepidocrocite Ferrihydrite Goethite Hematite Organic-Fe...comprised mainly of ferrihydrite (40–70%), lepidocrocite (10–40%) and an organic-Fe phase(s) (13–20%) |  | Pignatelli, Isabella, Mosser-Ruck, Régine, Mugnaioli, Enrico, Sterpenich, Jérôme, Gemmi, Mauro (2020) The Effect of the Starting Mineralogical Mixture on the Nature of Fe-Serpentines Obtained during Hydrothermal Synthesis AT 90°C. Clays and Clay Minerals, 68 (4). 394-412 doi:10.1007/s42860-020-00080-y | Journal (article/letter/editorial) | | associated with both berthierine and cronstedtite. Lepidocrocite was observed only in the experiment with kaolinite...kaolinite supplied by Sigma-Aldrich Co. (Darmstadt, Germany; Catalog #K7375; Ø 0.1–0.4 μm) and Fontainebleau...the Physikalisch-Technische Bundesanstalt (PTB, Germany) and the National Institute of Standards and Technology... Italy) using a Zeiss Libra TEM (Zeiss, Jena, Germany) operating at 120 kV and equipped with a LaB6 source...3°2θ, i.e. dhkl 2.97, 2.53, and 1.62 Å) and lepidocrocite (16.4 and 31.5°2θ, i.e. dhkl 6.28 and 3.30 Å) |  | | Journal (article/letter/editorial) | | [Aegirine] J. J. H. Teall 1888, Br. Petrogr. 368. Wolf Rock, SW of Land's End, Cornwall. Aenigmatite (Heddle...Soc. London, 23, 3. Beraunite recorded from Roury mine, Glandore, Co. Cork (A. Russell 1923, Mineral. Mag...H. Church 1865, J. Chem. Soc. 18, 213. Botallack Mine, Cornwall. [A distinct mineral, but requires further...1908, Mineral. Ma 9. 15, 285. Hingston Down Consols Mine, Calstock, Cornwall. Cathkinite (Glen and Young...Russell 19tl, Nature, 86, 180. Benallt manganese mine, Caernarvonshire. See also, L. J. Spencer 1942, |  | Zhang, Shu-Liang, Jia, Shao-Yi, Yu, Bo, Liu, Yong, Wu, Song-Hai, Han, Xu (2016) Sulfidization of As(V)-containing schwertmannite and its impact on arsenic mobilization. Chemical Geology, 420. 270-279 doi:10.1016/j.chemgeo.2015.11.020 | Journal (article/letter/editorial) | | 2002). Fe (oxyhydr)oxides (hematite, goethite, lepidocrocite, schwertmannite, etc.) play important roles...Fe(III)-oxyhydroxy-sulfate mineral, commonly found in acid-mine drainage (AMD), is a good scavenger for As(III)...dissolution of 275 ferrihydrite, goethite and lepidocrocite in solutions with high concentrations of S(−II)...that suspensions of ferrihydrite, goethite and lepidocrocite turned black with the addition of dissolved...not disappear until 2 weeks for goethite and lepidocrocite, whereas the suspension remained black for ferrihydrite |  | | Journal (article/letter/editorial) | | of the Clara Mines Ober-Wolfach, Baden, West Germany Outstanding crystals of barite and fluorite have...Black Forest, which forms the southwest corner o f Germany, bordering on France and Switzerland. I n many...opportunity for many sports. A l though the Clara mine is the mineralogists' chief target, there are many...when the mine was worked by the Kinzigthaler Mining Corporation. Today, the older Clara mine is abandoned...open pits, dumps, and closed tunnels. The new Clara mine is a mile and a quarter to the southwest. Current |
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Wolf Mine, Herdorf, Daaden-Herdorf, Altenkirchen, Rhineland-Palatinate, Germany