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The earliest known use of the noun alunite is in the 1820s. OED's earliest evidence for alunite is from 1821, in Synopsis Contents Brit. Mus. alunite is a borrowing from French. Etymons: French alunite. See etymology. Nearby entries.
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Download scientific diagram | Detailed occurrence of quartz and alunite crystals used for fluid inclusion mapping. (A and B) A centimetre-scale miarolitic cavity in breccia type Cu ore, showing ...
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Raman spectroscopy has been used to study the molecular structure of different natural minerals of the alunite supergroup (AB 3 (XO 4) 2 (OH) 6), with A = K +, Na +, Ca 2+, Sr 2+, Ba 2+, B = Al 3+, Fe 3+ and X = S 6+, P 5+.The influence of the ions, in A-, B- and X-sites, is highlighted in the Raman spectra by variations in the position of …
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Through the comparison between the experimental results and the predicted values, a shrinking core model with the surface chemical reaction control can be used to predict the leaching kinetics of alunite from alunite tailings in the concentrated KOH solution at 50 °C–90 °C with an acceptable accuracy, where the apparent activation …
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Alunite (KAl 3 (SO 4) 2 (OH) 6) is a hydrated aluminous sulfate mineral associated with acidic, oxidizing aqueous environments on Earth.Additionally, orbiting spacecraft and rovers on Mars have reported spectral data that indicate a range of mono- and polyhydrated sulfate phases and hydroxysulfate phases, suggesting such conditions …
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Alunite is an inconspicuous grayish massive mineral formed by the alteration of pyrite and other sulfides during weathering or solfatara activity. It is probably widespread in Wisconsin but has so far been reported from only one locality. Its habit, fine-grained nature and common intergrowth with minerals such as hematite, goethite, jarosite, melanterite and …
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See more on meanings.crystalsandjewelry
WEBGeneral Alunite Information : Chemical Formula: KAl3(SO4)2(OH)6 : Composition: Molecular Weight = 414.21 gm Potassium 9.44 % K 11.37 % K 2 O Aluminum 19.54 % Al 36.92 % Al 2 O 3 Hydrogen 1.46 % H 13.05 % …
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Alunite instead of fly ash can be used, since alunite is used as an accelerator in cement production [3]. Alunite, KAl 3 (SO 4 ) 2 (OH) 6, is a mineral not soluble in water in its original form. It is a basic potassium-alum occurring in rhombohedral crystals and one of the minerals of the jarosite group.
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The thermal decomposition of alunite is of an archeochemistry importance as alunite was used as a source of potassium. Further it has been suggested that the mineral exists on the planet Mars. If so then the wide ranging temperatures of Mars would affect the chemical composition of the alunite. Thus it is important to understand the thermal ...
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Alunite Mineral Facts: Chemical Formula: KAl 3 (SO 4) 2 (OH) 6 Double sulfate of aluminum and potassium. It has also been called alumstone, on account of its use in the …
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This chapter is organized into four sections. In the first section, crystallographic data for alunite-natroalunite and jarosite-natrojarosite are presented and discussed. The second section describes available thermodynamic data for these two solid-solution series, in terms of properties of the end-members and mixing properties for …
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The use of alunite as an adsorbent for the removal of dye was the aim of this report. Mixing the alunite with different salts may allow adsorption with higher efficiency. In the present study, the ...
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Icon is used in the design and interface of smartphones, cobalt is an essential component of smartphone batteries, and lithium is used to power smartphones. The other options, calcite, alunite, and halite, are not used in …
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Advanced argillic (AA) alteration produced by hydrothermal activity and subsequent supergene alteration in the Potrerillos district, Atacama Desert, Chile, includes sulfate-bearing and aluminosilicate alteration minerals. These alterations commonly contain alunite supergroup minerals (e.g., alunite, jarosite, and aluminum-phosphate-sulfate …
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Alunite is commonly found in volcanic rocks, such as rhyolites and andesites, and it often forms in the presence of hot springs and geothermal activity. Alunite has historical significance due to its use in the past for the production of alum, a compound with applications in dyeing and tanning.
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Named from the Latin for alum. Co-Type Localities: ⓘ Allumiere Quarries, Allumiere, Metropolitan City of Rome Capital, Lazio, Italy. ⓘ Muzhijevo (Muzhievo deposit), Berehove, Berehove Raion, Zakarpattia Oblast, Ukraine. Common member of the alunite supergroup. The Al analogue of jarosite and the K analogue of natroalunite.
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Daca exista expuneri la soare intense /prelungite. Daca alunitele sunt in numar mare. Majoritatea alunitelor sunt benigne la evaluarea dermatoscopica, urmand sa fie reevaluate periodic (cand este necesar ). Alunitele care prezinta suspiciune pentru melanom se recomanda a fi excizate chirurgical si examinate histopatologic.
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The meaning of ALUNITE is a mineral that consists of a hydrous potassium aluminum sulfate and occurs in massive form or in rhombohedral crystals.
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Many different minerals, such as alum schist, alunite, bauxite, and cryolite, are used in the extraction process to get alum. One must first extract the initial mineral using a specialized procedure. Calcination is …
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The thermal decompositions of both non-activated and mechanically activated alunite ore have been studied by thermogravimetry (TG). The ore was activated mechanically in an attritor for 15 min and amorphisation in the structure was studied by X-ray diffraction analysis.It can be verified that alunite decomposes in two steps, which are …
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The alunite supergroup consists of more than 40 mineral species that have in common the general formula DG3(TO4)2(OH,H2O)6. The D sites are occupied by monovalent (e.g. K, Na, NH4, Ag, Tl, H3O), divalent (e.g. Ca, Sr, Ba, Pb), trivalent (e.g. Bi, REE) or more rarely quadrivalent (Th) ions; G is Al or Fe3+ or rarely Ga or V; T is S6+, As5+, or P5+, and …
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The alunite supergroup of minerals is a large hydroxy-sulfate mineral group, which has seen renewed interest following their discovery on Mars.
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Mineral Group: Alunite group. Occurrence: Formed between 15 C and 400 C by the action of sulfate, which may be generated from pyrite or solfataric action, on aluminous rocks, …
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In the planetary literature, the terms "jarosite" and "alunite" are widely used to refer to any member of these subgroups, even though these terms formally refer only to the K-bearing endmembers. At Mollies Nipple, the A sites of the minerals are occupied predominantly by K, so the use of jarosite and alunite refers to the specific ...
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The Alunite district is located in the vicinity of Railroad Pass about 19 miles southeast of Las Vegas. The district occupies most of T23S, R63E in the Black Hills, southwest of Railroad Pass. The southern part of the district may have been known as Flatiron in 1910. Averett (1962) lists Glonite as an alternate name.
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Alunite Meanings Properties Powers & Uses Balances Yin-Yang Energy By Liz Oakes. Alunite is known as stone that is balancing to the yin and yang energies.. It has a good grounding and stabilizing energy that helps to stabilize you both physically and emotionally. It has a good action to enhance creativity, and to particularly bring the creative aspects …
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Alunite definition: a mineral, a hydrous sulfate of potassium and aluminum, KAl3(SO4)2(OH)6, commonly occurring in fine-grained masses. See examples of ALUNITE used in a sentence.
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