jarosite


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jarosite

(ˈdʒærəˌsaɪt)
n
(Minerals) a yellow to brown secondary mineral consisting of basic hydrated sulphate of iron and potassium in masses or hexagonal crystals. Formula: KFe3(SO4)2(OH)6
[C19: from Barranco Jaroso, in Almeria, Spain + -ite1]
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In the longer times, both bacterial activity and cell numbers decreased, and also, jarosite formation was seen in the solution.
Moving up the Mount Sharp ladder, the types of minerals locked inside the sediment changed, cycling through clay minerals that form when water has roughly a neutral pH - indicating it is neither acidic nor alkaline - as well as a type of mineral called jarosite that forms in more acidic liquid.
It is lithologically represented by brownish-gray clays with jarosite tarnish and inter-layers of gray, fine-grained sandstones, and by marlaceous and sideritic concretions.
Jarosite, schwertmannite, goethite, ferrihydrite and lepidocrocite: The legacy of coal and sulfide ore mining.
They are usually sulphidic (acidic) and produce yellow coloured minerals known as jarosite after oxidation and exposure to the atmosphere (Fitzpatrick et al.
On Earth, jarosite can form in ore deposits or from alteration near volcanic vents, and indicates an oxidizing and acidic environment.
Economically important nickel-cobalt deposits and low grade polymetallic wastes, iron containing sludges (goethite, jarosite etc.
5) and the presence of yellowish jarosite within the 050 cm depth (Shamshuddin, 2006).
In the visible region, both iron oxides and jarosite (hydrous sulphate of potassium and iron) exhibit an increase in its spectral response.
If not fully removed, elements can precipitate as or become incorporated in authigenic minerals such as jarosite (K[Fe.
Under atmospheric conditions, this part of pyrite is rapidly replaced by jarosite and anhydrite.