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  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin Heidelberg :
    Keywords: Earth sciences. ; Geotechnical engineering. ; Materials Analysis. ; Mineralogy. ; Geography. ; Earth Sciences. ; Geotechnical Engineering and Applied Earth Sciences. ; Characterization and Analytical Technique. ; Mineralogy. ; Earth and Environmental Sciences.
    Description / Table of Contents: Introduction -- Materials -- Mineral Raw Materials -- Ceramics -- Glass -- Building Materials -- Refractory Materials -- Electronics -- Hard Materials -- Crystal Growth -- Energy -- Environmental Mineralogy -- Biomineralogy -- Steel.
    Abstract: This textbook teaches important material and technological fundamentals in various technical systems and applied geoscientific fields. Beginning with the mineralogical characteristics of selected non-metallic raw materials and industrial minerals, this book presents the connections between properties and industrial applications and discusses the environment-relevant aspects as well as problems of biomineralogy. An introduction is given to important mineralogical and physico-chemical aspects of ceramic materials such as silicate ceramics, glass, cement, refractory materials as well as an overview about material synthesis. This makes it the first textbook to present the fundamentals of applied mineralogy as a material-related geoscience in a compact form and to show important bridges to industrial issues and approaches to solutions. It is aimed primarily at undergraduate students of geosciences and materials science, but is also suitable for related disciplines and practical applications. The authors Prof. Dr. Jens Götze and Prof. Dr. Matthias Göbbels, teach and research in the field of applied mineralogy at the Institute of Mineralogy of the TU Bergakademie Freiberg, Germany and at the Chair of Mineralogy of the Friedrich-Alexander University Nuremberg-Erlangen, Germany, respectively, and have had intensive industrial contacts and cooperation for many years. This book is a translation of an original German edition. The translation was done with the help of artificial intelligence (machine translation by the service DeepL.com). A subsequent human revision was done primarily in terms of content, so that the book will read stylistically differently from a conventional translation.
    Type of Medium: Online Resource
    Pages: IX, 266 p. 214 illus., 83 illus. in color. , online resource.
    Edition: 1st ed. 2023.
    ISBN: 9783662648674
    DDC: 550
    Language: English
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  • 2
    Unknown
    Basel, Beijing, Wuhan, Barcelona, Belgrade : MDPI
    Keywords: quartz ; opal ; agate ; SiO2 deposits and raw materials ; processing of quartz raw materials ; analytics of high-purity quartz ; quartz mineralogy ; structure and properties of quartz ; geochemistry/trace elements ; spectroscopic methods
    Description / Table of Contents: Lin, M.; Pei, Z.; Lei, S. Mineralogy and Processing of Hydrothermal Vein Quartz from Hengche, Hubei Province (China). Minerals 2017, 7(9), 161; https://doi.org/10.3390/min7090161 --- Götze, J.; Pan, Y.; Müller, A.; Kotova, E.; Cerin, D. Trace Element Compositions and Defect Structures of High-Purity Quartz from the Southern Ural Region, Russia. Minerals 2017, 7(10), 189; https://doi.org/10.3390/min7100189 --- Liesegang, M.; Milke, R. Silica Colloid Ordering in a Dynamic Sedimentary Environment. Minerals 2018, 8(1), 12; https://doi.org/10.3390/min8010012 --- Pei, Z.; Lin, M.; Liu, Y.; Lei, S. Dissolution Behaviors of Trace Muscovite during Pressure Leaching of Hydrothermal Vein Quartz Using H2SO4 and NH4Cl as Leaching Agents. Minerals 2018, 8(2), 60; https://doi.org/10.3390/min8020060 --- Richter-Feig, J.; Möckel, R.; Götze, J.; Heide, G. Investigation of Fluids in Macrocrystalline and Microcrystalline Quartz in Agate Using Thermogravimetry-Mass-Spectrometry. Minerals 2018, 8(2), 72; https://doi.org/10.3390/min8020072 --- Guatame-Garcia, A.; Buxton, M. The Use of Infrared Spectroscopy to Determine the Quality of Carbonate-Rich Diatomite Ores. Minerals 2018, 8(3), 120; https://doi.org/10.3390/min8030120 --- Müller, A.; Ganerød, M.; Wiedenbeck, M.; Svendsen Spjelkavik, S.; Selbekk, R. The Hydrothermal Breccia of Berglia-Glassberget, Trøndelag, Norway: Snapshot of a Triassic Earthquake. Minerals 2018, 8(5), 175; https://doi.org/10.3390/min8050175 --- Sittner, J.; Götze, J. Cathodoluminescence (CL) Characteristics of Quartz from Different Metamorphic Rocks within the Kaoko Belt (Namibia). Minerals 2018, 8(5), 190; https://doi.org/10.3390/min8050190 --- Kayama, M.; Nagaoka, H.; Niihara, T. Lunar and Martian Silica. Minerals 2018, 8(7), 267; https://doi.org/10.3390/min8070267 --- Voudouris, P.; Melfos, V.; Mavrogonatos, C.; Tarantola, A.; Gӧtze, J.; Alfieris, D.; Maneta, V.; Psimis, I. Amethyst Occurrences in Tertiary Volcanic Rocks of Greece: Mineralogical, Fluid Inclusion and Oxygen Isotope Constraints on Their Genesis. Minerals 2018, 8(8), 324; https://doi.org/10.3390/min8080324 --- Taksavasu, T.; Monecke, T.; Reynolds, T. Textural Characteristics of Noncrystalline Silica in Sinters and Quartz Veins: Implications for the Formation of Bonanza Veins in Low-Sulfidation Epithermal Deposits. Minerals 2018, 8(8), 331; https://doi.org/10.3390/min8080331 --- Wertich, V.; Leichmann, J.; Dosbaba, M.; Götze, J. Multi-Stage Evolution of Gold-Bearing Hydrothermal Quartz Veins at the Mokrsko Gold Deposit (Czech Republic) Based on Cathodoluminescence, Spectroscopic, and Trace Elements Analyses. Minerals 2018, 8(8), 335; https://doi.org/10.3390/min8080335 --- Trümper, S.; Rößler, R.; Götze, J. Deciphering Silicification Pathways of Fossil Forests: Case Studies from the Late Paleozoic of Central Europe. Minerals 2018, 8(10), 432; https://doi.org/10.3390/min8100432 --- Götze, J. Editorial for Special Issue “Mineralogy of Quartz and Silica Minerals”. Minerals 2018, 8(10), 467; https://doi.org/10.3390/min8100467
    Pages: Online-Ressource (IX, 261 Seiten) , Illustrationen, Diagramme, Karten
    Edition: Printed Edition of the Special Issue Published in Minerals
    ISBN: 9783038973492
    Language: English
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  • 3
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Agate/chalcedony samples of different origin were investigated by performing Raman, X-ray diffraction (using Rietveld refinement), and cathodoluminescence measurements. These analyses were performed to measure the content and spatial distribution of the silica polymorph moganite, which is considered to represent periodic Brazil-law twinning of α-quartz at the unit-cell scale in agate/chalcedonies. Homogeneous standard samples including the nearly α-quartz free moganite type material from Gran Canaria were analysed in order to compare results of the X-ray diffractometry and Raman spectroscopy techniques and to provide a calibration curve for the Raman results. However, due to the different length scales analysed by the two techniques, the “moganite content” in microcrystalline SiO2 samples measured by Raman spectroscopy (short-range order) was found to be considerably higher than the “moganite content” measured by X-ray diffractometry (long-range order). The difference is explained by the presence of moganite nanocrystals, nano-range moganite lamellae, and single Brazil-law twin-planes that are detected by vibrational spectroscopy but that are not large enough (in the sense of coherently scattering lattice domains) to be detected by X-ray diffractometry. High resolution Raman analysis provides a measure of the moganite content and its spatial variation in microcrystalline silica samples with a lateral resolution in the μm-range. Variations in the moganite-to-quartz ratio are revealed by varying intensity ratios of the main symmetric stretching-bending vibrations (A1 modes) of α-quartz (465 cm−1) and moganite (502 cm−1), respectively. Traces of Raman microprobe analyses perpendicular to the rhythmic zoning of agates revealed that the moganite-to-quartz ratio is often not uniform but shows a cyclic pattern that correlates with the observed cathodoluminescence pattern (colour and intensity). Data obtained from an agate sample from a fluorite deposit near Okorusu, Namibia and from a volcanic agate from Los Indios, Cuba were selected for detailed presentation. Variations of cathodoluminescence and Raman data between single bands in agates suggest alternating formation of fine-grained, highly defective chalcedony intergrown with moganite, and coarse-grained low-defect quartz. Multiple zones indicate dynamic internal growth during a self-organizational crystallization process from silica-rich fluids.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract We present results of a detailed investigation of zircons from two rhyolites from St. Egidien and Chemnitz, Saxony, using a combination of microprobe techniques (SHRIMP ion probe, Raman microprobe, SEM: SE, BSE, and CL imaging). These rhyolites belong to the so-called “lower volcanics”, which is the older of two series of Late Variscan volcanic rocks occurring in the Saxonian Sub-Erzgebirge basin (Germany). The purpose of the present contribution is to demonstrate that detailed characterization of zircons, as provided by the different micro-techniques, facilitates soundest interpretation of geochronological data. The zircons (at most 40 to 80 m in size) show oscillatory growth zoning, with reversely correlated CL and BSE signal intensities. These zircons are interpreted to have grown during crystallization of the rhyolite because, apart from some cracking, they do not appear to have experienced any alteration since the time of their growth: The shapes of the zircons and their internal structures revealed by CL and BSE imaging appear to be magmatic, and neither annealing of the accumulated alpha-decay damage nor disturbance of the U-Pb system is observed. The SHRIMP ion probe measurements on the zircons gave a Permian 206Pb/238U age of 278 ± 5 Ma (95% confidence). The concordance of this age is supported by the correlation between the low degrees of metamictization (estimated from Raman parameters) and the accumulated alpha fluxes (calculated from SHRIMP data). The 278 Ma zircon age is interpreted to represent the age of the “lower rhyolites” series and, with that, the age of postkinematic Late Variscan volcanism in the Sub-Erzgebirge basin, which has been related to anorogenic extension and uplift as a result of intracontinental rifting. Because of genetic association of rhyolites in the Sub-Erzgebirge basin and Li-F granites and lamprophyres in the neighbouring Erzgebirge, the rhyolite age also indirectly contributes to the understanding of the geological history of the Erzgebirge. The 278 Ma age is the first absolute dating result for rhyolites from the Saxonian Sub-Erzgebirge basin.
    Type of Medium: Electronic Resource
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  • 5
    Publication Date: 2023-06-14
    Description: Textures and whole-rock chemistry, as well as mineral composition, were analyzed in megaspherulites (high-temperature crystallization domains [HTCDs]) that formed in different geographical and geotectonic contexts and during different geological periods (Silver Cliff, CO, USA—Paleogene; El Quevar, Argentina—Miocene; Meissen Volcanic Complex, Germany—Late Carboniferous). All of these megaspherulites have formed exclusively in rhyolitic lava, and their mineral composition is dominated by K-feldspar (sanidine) and SiO2 phases (quartz, cristobalite, tridymite). All megaspherulites represent composite HTCDs, comprising three zones: inner domain (ID), outer domain (OD), and a marginal domain (MD). Early evolution of megaspherulites is characterized by either central cavities and sector- to full-sphere spherulites or dendritic quartz-sanidine domains. The latter consist of bundles of fibrils each radiating from a single point reflecting relatively high growth rates. A common feature of OD and MD of all three megaspherulite occurrences is autocyclic banding. It mainly comprises fibrous (≤ 100 μm length), radially oriented sanidine and quartz, which formed at a temperature close to glass transition temperature (Tg). The termination of megaspherulite growth is marked by centimeter-sized sector-sphere spherulites on the surface. Megaspherulite formation requires limited nucleation, which is probably related to the low phenocryst content of the hosting lava. Latent heat from overlying crystallizing lithoidal rhyolite maintained low undercooling conditions keeping nucleation density low and facilitating high diffusion and growth rates. Late megaspherulite growth and its termination under low diffusion conditions is controlled by cooling close to Tg. Calculations based on literature data suggest that the megaspherulite growth presumably lasted less than 60 years, perhaps 30 to 40 years.
    Keywords: ddc:549 ; Rhyolitic lava ; SEM ; CL ; XRD ; EPMA ; Cristobalite ; Tridymite
    Language: English
    Type: doc-type:article
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  • 6
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    Unknown
    Mineralogical Society of Great Britain and Ireland
    Publication Date: 2018
    Description: 〈div data-abstract-type="normal"〉 〈p〉Agates with spectacular micro-structural features were found in volcanic rocks at several occurrences in the Saar-Nahe region (Germany). These agates include spirals of several tens up to several hundreds of μm in size within zones lacking the characteristic structural agate banding. A combined mineralogical study by polarising microscopy, scanning electron microscopy, cathodoluminescence microscopy and spectroscopy, and electron backscatter diffraction provided evidence that the spirals consist of well-ordered trigonal α-quartz, whereas the surrounding matrix is composed of strongly disordered or amorphous SiO〈span〉2〈/span〉 phases. The quartz micro-crystals show a systematic rotation of the crystal orientation perpendicular to the direction of the spiral loops indicating helical growth.〈/p〉 〈p〉It is assumed that the spiral growth is initiated by dislocations with a screw component. The lacking symmetry of the strongly disordered or amorphous matrix initiated a curved development by a screw dislocation in a system far from equilibrium. The atoms/molecules are packed into spiral layers, which is energetically favoured in comparison with the incorporation into plane crystal faces. Such self-organisation growth and polymerisation initiated by a screw dislocation can produce variable spiral morphologies sometimes resembling living forms.〈/p〉 〈/div〉
    Print ISSN: 0026-461X
    Electronic ISSN: 1471-8022
    Topics: Geosciences
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  • 7
  • 8
    Publication Date: 2017-03-01
    Electronic ISSN: 2352-3964
    Topics: Biology , Medicine
    Published by Elsevier
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  • 9
    Publication Date: 2002-10-01
    Print ISSN: 1618-2642
    Electronic ISSN: 1618-2650
    Topics: Chemistry and Pharmacology
    Published by Springer
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  • 10
    Publication Date: 2017-05-01
    Print ISSN: 0008-4476
    Electronic ISSN: 1499-1276
    Topics: Geosciences
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