Goethite (/ˈɡɜːrtaɪt/, US also /ˈɡoʊθaɪt/) is a mineral of the diaspore group, consisting of iron(III) oxide-hydroxide, specifically the α-polymorph. It...
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within the matrix that control goethite crystal size and shape. Because of this, the main factor influencing goethite crystal growth is the chitin fibers...
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different minerals (polymorphs) denoted by the Greek letters α, β, γ and δ. Goethite, α-FeO(OH), has been used as an ochre pigment since prehistoric times....
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green or blue sheen. Oranges and browns are attributed to hematite or goethite. Because aventurine is a rock, its physical properties vary: its specific...
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β-Fe2O3: beta phase γ-Fe2O3: gamma phase, maghemite ε-Fe2O3: epsilon phase goethite (α-FeOOH), akaganéite (β-FeOOH), lepidocrocite (γ-FeOOH), feroxyhyte (δ-FeOOH)...
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produce ferric iron (Fe3+(aq)), which typically leads to hydroxides such as goethite (FeO•OH) under experimental conditions. While this reaction with water...
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drab colored ferric hydroxides. These ferric hydroxides commonly include goethite (FeO-OH) and so-called "amorphous ferric hydroxide" or limonite. Much of...
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processes in soil, and along with other iron oxides or oxyhydroxides such as goethite, which is responsible for the red color of many tropical, ancient, or otherwise...
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minerals that form concretions include iron oxides or hydroxides (such as goethite and hematite), dolomite, siderite, ankerite, marcasite, barite, and gypsum...
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lindgrenite 5 Apatite, tooth enamel, zirconium, obsidian (volcanic glass) 5-5.5 Goethite 5.5 Cobalt, beryllium, glass, perovskite, chromite, bavenite, agrellite...
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oxides are limonite (which in its natural state has a yellowish color), and goethite. In addition to iron oxides, natural or raw sienna is also composed of...
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chrysoprase. Fire agate is a variety of chalcedony with inclusions of goethite or limonite causing an iridescent effect. It can display a wide range of...
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the form of magnetite (Fe 3O 4, 72.4% Fe), hematite (Fe 2O 3, 69.9% Fe), goethite (FeO(OH), 62.9% Fe), limonite (FeO(OH)·n(H2O), 55% Fe), or siderite (FeCO3...
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anhydrite, halite, polyhalite Brine precipitate: Fe-montmorillonite, goethite, hematite, siderite, rhodochrosite, pyrite, sphalerite, anhydrite. The...
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cyanidation. The ore is located in the VMS Early Cretaceous Maimón Formation. Goethite enriched with gold and silver is found in the 30-meter thick oxide cap...
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magnesium and silica. They consist largely of goethite and contain 1–2% nickel incorporated in goethite. Absence of the limonite zone in the ore deposits...
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atomic arrangement. Goethite-like structures are common because goethite is in the same space group as olivine. This allows for goethite to grow within the...
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associated with a greater average particle size. Brown ochre, also FeO(OH), (goethite), is a partly hydrated iron oxide. Simiarly, lepidocrocite — γ-FeO(OH)...
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Australian deposits, chrysoprase occurs as veins and nodules with brown goethite and other iron oxides in the magnesite-rich saprolite below an iron and...
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Schweitzer and her colleagues reported the presence of iron particles (goethite-aFeO(OH)) associated with soft tissues recovered from dinosaur fossils...
109 KB (11,337 words) - 17:53, 3 August 2024
evolution and linguistics. He was fascinated by mineralogy, and the mineral goethite (iron oxide) is named after him. His non-fiction writings, most of which...
109 KB (12,580 words) - 17:34, 1 August 2024
for frequently forming botryoidal masses. It is also a common form of goethite, smithsonite, fluorite, and chrysocolla. Similar habits are reniform (kidney-shaped)...
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including iron compounds such as iron oxide (ochre),: 204 hematite, and goethite, as well as manganese-containing pigments.: 208 Charcoal may also have...
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In general, bog ores consist primarily of iron oxyhydroxides, commonly goethite (FeO(OH)). Iron-bearing groundwater typically emerges as a spring and the...
20 KB (2,423 words) - 10:51, 11 May 2024
boehmite (γ-AlO(OH)) and diaspore (α-AlO(OH)), mixed with the two iron oxides goethite (FeO(OH)) and haematite (Fe2O3), the aluminium clay mineral kaolinite (Al2Si2O5(OH)4)...
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High-strength carbon nanotube film — 9,600 — Iron (pure mono-crystal) 3 7.874 Limpet Patella vulgata teeth (goethite whisker nanocomposite) 4,900 3,000–6,500...
30 KB (2,047 words) - 15:32, 16 May 2024
brown" is composed of a mixture of kaolin, quartz, goethite, and hematite, with the hematite and goethite (generally 60% of the content) determining the colour...
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effect is due to reflections from inclusions of red copper, hematite, or goethite, in the form of minute scales, which are hexagonal, rhombic, or irregular...
8 KB (692 words) - 08:51, 1 November 2023