How To Use Goethite In A Sentence
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Most, if not all, of these mines have likely produced specimen-quality hematite, goethite, and perhaps other minerals.
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Two small dumps are exposed, affording an opportunity to collect some of the attractive microcrystals of rhodochrosite and crystals of apatite, gypsum, barite, goethite, marcasite, calcite, and chalcocite that are found there.
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The area has been a prolific source of smoky quartz, amazonite, occasional topaz, and other accessory minerals, including albite, fluorite, phenakite, columbite, cassiterite, goethite, and many others.
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Also associated with smoky quartz are microcline, fluorite, goethite (some as ‘onegite’), and topaz.
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The area has been a prolific source of smoky quartz, amazonite, occasional topaz, and other accessory minerals, including albite, fluorite, phenakite, columbite, cassiterite, goethite, and many others.
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Crystals commonly display rhombic dodecahedral morphology, are generally small, and are frequently replaced by goethite or other iron oxides/hydroxides.
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Microcrystals of pyrrhotite, goethite, pyrite, galena, and calcite are found on the dumps.
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Another relatively new discovery is pyrite as attractive, sharp, cubic crystals, to 1 cm on edge, altered to goethite.
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Impressive blades and masses of lustrous micaceous hematite occur in localized quartz veins, and reniform goethite is found in the walls.
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Microcrystals of azurite and goethite and a small number of microcrystals of chalcocite were also recovered.
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It includes goethite on quartz, secondary quartz enclosing already crystallized goethite, and goethite and secondary quartz crystallizing together.
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Goethite forms only in the presence of water, whether in liquid, ice or gaseous form.
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Specialty chemicals group LANXESS has now developed a product that can reliably remove this toxic metalloid from drinking water: Lewatit FO36 is an innovative hybrid adsorber consisting of a combination of a polymeric anion exchange resin and an iron oxide with a goethite structure.
Undefined
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There are various subtypes: goethite (needle iron ore, pyrrhosiderite): a-FeO (OH), lepidocrocite (ruby glance): b-FeO (OH), limonite: (by appearance) amorphous.
6. Purifying absorbent
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These soils have a typical, immature tropical soil mineral assemblage dominated by kaolin, quartz and goethite.
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Although each mound had substantial amounts of quartz and kaolinite, minerals that reflected differences in mound material included magnetite, gypsum, hornblende, hematite, goethite, and feldspars.
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Impressive blades and masses of lustrous micaceous hematite occur in localized quartz veins, and reniform goethite is found in the walls.
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Some of this quartz exhibits amethyst coloration, and the totally included goethite obviously crystallized at the same time the quartz was forming.
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It consists largely of the minerals gibbsite Al (OH) 3, boehmite γ-AlO (OH), and diaspore α-AlO (OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2.
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Most, if not all, of these mines have likely produced specimen-quality hematite, goethite, and perhaps other minerals.
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Like hematite, some goethite is pseudomorphic after a rhombohedral carbonate mineral.
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Although each mound had substantial amounts of quartz and kaolinite, minerals that reflected differences in mound material included magnetite, gypsum, hornblende, hematite, goethite, and feldspars.
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Like hematite, some goethite is pseudomorphic after a rhombohedral carbonate mineral.
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Impressive blades and masses of lustrous micaceous hematite occur in localized quartz veins, and reniform goethite is found in the walls.
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Oxidation of the deposit is quite extensive, and limonite is common; therefore, although I did not observe goethite, it is probably present.
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It consists largely of the minerals gibbsite Al (OH) 3, boehmite γ-AlO (OH), and diaspore α-AlO (OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2.
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Tiny crystals of hematite, goethite, chalcopyrite, marcasite, and dolomite are common and make excellent micromounts.
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They often have grown around pre-existing acicular goethite crystals in random orientation, clearly demonstrating the quartz to be of a later growth.
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The former habit is best known as the diagnostic morphology exhibited by stilbite; the latter is seen in many minerals, from malachite to chalcedony to goethite.
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It consists largely of the minerals gibbsite Al (OH) 3, boehmite γ-AlO (OH), and diaspore α-AlO (OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase TiO2.
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Most specimens are on a typical brown goethite matrix and may have associated calcite, plattnerite, barite, fluorite, and hemimorphite.
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Tiny crystals of hematite, goethite, chalcopyrite, marcasite, and dolomite are common and make excellent micromounts.
